diff --git a/mindspore/ccsrc/minddata/dataset/api/python/bindings/dataset/core/bindings.cc b/mindspore/ccsrc/minddata/dataset/api/python/bindings/dataset/core/bindings.cc
index ca06deb0ee..64616b8d84 100644
--- a/mindspore/ccsrc/minddata/dataset/api/python/bindings/dataset/core/bindings.cc
+++ b/mindspore/ccsrc/minddata/dataset/api/python/bindings/dataset/core/bindings.cc
@@ -42,7 +42,6 @@ PYBIND_REGISTER(ConfigManager, 0, ([](const py::module *m) {
                     .def("get_numa_enable", &ConfigManager::numa_enable)
                     .def("set_numa_enable", &ConfigManager::set_numa_enable)
                     .def("get_op_connector_size", &ConfigManager::op_connector_size)
-                    .def("get_rows_per_buffer", &ConfigManager::rows_per_buffer)
                     .def("get_seed", &ConfigManager::seed)
                     .def("set_rank_id", &ConfigManager::set_rank_id)
                     .def("get_worker_connector_size", &ConfigManager::worker_connector_size)
@@ -54,7 +53,6 @@ PYBIND_REGISTER(ConfigManager, 0, ([](const py::module *m) {
                     .def("get_profiler_file_status", &ConfigManager::get_profiler_file_status)
                     .def("set_num_parallel_workers", &ConfigManager::set_num_parallel_workers)
                     .def("set_op_connector_size", &ConfigManager::set_op_connector_size)
-                    .def("set_rows_per_buffer", &ConfigManager::set_rows_per_buffer)
                     .def("set_seed", &ConfigManager::set_seed)
                     .def("set_worker_connector_size", &ConfigManager::set_worker_connector_size)
                     .def("load", [](ConfigManager &c, std::string s) { THROW_IF_ERROR(c.LoadFile(s)); });
diff --git a/mindspore/ccsrc/minddata/dataset/core/config_manager.cc b/mindspore/ccsrc/minddata/dataset/core/config_manager.cc
index 87dd6e1345..f4f8469daa 100644
--- a/mindspore/ccsrc/minddata/dataset/core/config_manager.cc
+++ b/mindspore/ccsrc/minddata/dataset/core/config_manager.cc
@@ -31,8 +31,7 @@
 namespace mindspore {
 namespace dataset {
 ConfigManager::ConfigManager()
-    : rows_per_buffer_(kCfgRowsPerBuffer),
-      num_parallel_workers_(kCfgParallelWorkers),
+    : num_parallel_workers_(kCfgParallelWorkers),
       worker_connector_size_(kCfgWorkerConnectorSize),
       op_connector_size_(kCfgOpConnectorSize),
       rank_id_(kCfgDefaultRankId),
@@ -70,7 +69,6 @@ void ConfigManager::Print(std::ostream &out) const {
   // Don't show the test/internal ones.  Only display the main ones here.
   // fyi, boolalpha tells the output stream to write "true" and "false" for bools
   out << "\nClient config settings :"
-      << "\nDataCache Rows per buffer    : " << rows_per_buffer_
       << "\nParallelOp workers           : " << num_parallel_workers_
       << "\nParallelOp worker connector size    : " << worker_connector_size_
       << "\nSize of each Connector : " << op_connector_size_ << std::endl;
@@ -78,7 +76,6 @@ void ConfigManager::Print(std::ostream &out) const {
 
 // Private helper function that takes a nlohmann json format and populates the settings
 Status ConfigManager::FromJson(const nlohmann::json &j) {
-  set_rows_per_buffer(j.value("rowsPerBuffer", rows_per_buffer_));
   set_num_parallel_workers(j.value("numParallelWorkers", num_parallel_workers_));
   set_worker_connector_size(j.value("workerConnectorSize", worker_connector_size_));
   set_op_connector_size(j.value("opConnectorSize", op_connector_size_));
@@ -115,9 +112,6 @@ Status ConfigManager::LoadFile(const std::string &settingsFile) {
   return rc;
 }
 
-// Setter function
-void ConfigManager::set_rows_per_buffer(int32_t rows_per_buffer) { rows_per_buffer_ = rows_per_buffer; }
-
 // Setter function
 void ConfigManager::set_num_parallel_workers(int32_t num_parallel_workers) {
   num_parallel_workers_ = num_parallel_workers;
diff --git a/mindspore/ccsrc/minddata/dataset/core/config_manager.h b/mindspore/ccsrc/minddata/dataset/core/config_manager.h
index 21d2f06aa4..59d9ee056a 100644
--- a/mindspore/ccsrc/minddata/dataset/core/config_manager.h
+++ b/mindspore/ccsrc/minddata/dataset/core/config_manager.h
@@ -74,10 +74,6 @@ class ConfigManager {
   // @return Status error code
   Status LoadFile(const std::string &settingsFile);
 
-  // getter function
-  // @return The rows per buffer setting
-  int32_t rows_per_buffer() const { return rows_per_buffer_; }
-
   // getter function
   // @return The number of workers setting
   int32_t num_parallel_workers() const { return num_parallel_workers_; }
@@ -112,10 +108,6 @@ class ConfigManager {
   /// \return auto_num_workers_
   bool auto_num_workers() const { return auto_num_workers_; }
 
-  // setter function
-  // @param rows_per_buffer - The setting to apply to the config
-  void set_rows_per_buffer(int32_t rows_per_buffer);
-
   // setter function
   // @param num_parallel_workers - The setting to apply to the config
   void set_num_parallel_workers(int32_t num_parallel_workers);
@@ -230,7 +222,6 @@ class ConfigManager {
   void set_auto_worker_config_(uint8_t cfg) { auto_worker_config_ = cfg; }
 
  private:
-  int32_t rows_per_buffer_;
   int32_t num_parallel_workers_;
   int32_t worker_connector_size_;
   int32_t op_connector_size_;
diff --git a/mindspore/ccsrc/minddata/dataset/core/tensor_row.cc b/mindspore/ccsrc/minddata/dataset/core/tensor_row.cc
index 83701a46ad..640975c9a5 100644
--- a/mindspore/ccsrc/minddata/dataset/core/tensor_row.cc
+++ b/mindspore/ccsrc/minddata/dataset/core/tensor_row.cc
@@ -35,7 +35,7 @@ TensorRow::TensorRow(row_id_type id, const std::initializer_list<value_type> &ls
 TensorRow::TensorRow(const TensorRow &tr)
     : id_(tr.id_), path_(tr.path_), row_(tr.row_), tensor_row_flag_(tr.tensor_row_flag_) {}
 
-TensorRow::TensorRow(TensorRow::TensorRowFlags flag) : tensor_row_flag_(flag) {}
+TensorRow::TensorRow(TensorRow::TensorRowFlags flag) : id_(kDefaultRowId), path_({}), tensor_row_flag_(flag) {}
 
 TensorRow &TensorRow::operator=(const TensorRow &tr) {
   if (this == &tr) {
diff --git a/mindspore/ccsrc/minddata/dataset/engine/cache/perf/cache_perf_run.cc b/mindspore/ccsrc/minddata/dataset/engine/cache/perf/cache_perf_run.cc
index 76c6becdf8..97edf22cba 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/cache/perf/cache_perf_run.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/cache/perf/cache_perf_run.cc
@@ -540,8 +540,7 @@ Status CachePerfRun::Run() {
   int64_t elapse_time = std::chrono::duration_cast<std::chrono::seconds>(end_tick - start_tick).count();
   std::cout << "Epoch one (build phase) elapsed time " << elapse_time << " seconds" << std::endl;
 
-  std::cout << "Epoch one (build phase) per pipeline per worker summary. Buffer size = " << cfg_.rows_per_buffer()
-            << std::endl;
+  std::cout << "Epoch one (build phase) per pipeline per worker summary." << std::endl;
   PrintEpochSummary();
 
   // Get some stat but we need to connect. The server will thinks it is the (n+1) pipeline
diff --git a/mindspore/ccsrc/minddata/dataset/engine/cache/perf/cache_pipeline_run.cc b/mindspore/ccsrc/minddata/dataset/engine/cache/perf/cache_pipeline_run.cc
index 0005f1b342..27c1887625 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/cache/perf/cache_pipeline_run.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/cache/perf/cache_pipeline_run.cc
@@ -228,16 +228,13 @@ Status CachePipelineRun::RunFirstEpoch() {
   }
 
   std::vector<row_id_type> keys;
-  auto rows_per_buffer = cfg_.rows_per_buffer();
-  keys.reserve(rows_per_buffer);
+  keys.reserve(1);
   int32_t worker_id = 0;
   for (auto i = start_row_; i <= end_row_; ++i) {
     keys.push_back(i);
-    if (keys.size() == rows_per_buffer) {
-      auto blk = std::make_unique<IOBlock>(IOBlock(keys, IOBlock::kDeIoBlockNone));
-      RETURN_IF_NOT_OK(io_block_queues_[worker_id++ % num_workers]->Add(std::move(blk)));
-      keys.clear();
-    }
+    auto blk = std::make_unique<IOBlock>(IOBlock(keys, IOBlock::kDeIoBlockNone));
+    RETURN_IF_NOT_OK(io_block_queues_[worker_id++ % num_workers]->Add(std::move(blk)));
+    keys.clear();
   }
   if (!keys.empty()) {
     auto blk = std::make_unique<IOBlock>(IOBlock(keys, IOBlock::kDeIoBlockNone));
@@ -355,9 +352,8 @@ Status CachePipelineRun::WriterWorkerEntry(int32_t worker_id) {
 
 Status CachePipelineRun::RunReadEpoch() {
   std::vector<row_id_type> keys;
-  auto rows_per_buffer = cc_->GetPrefetchSize();  // We will use prefetch size to read.
   auto num_workers = cfg_.num_parallel_workers();
-  keys.reserve(rows_per_buffer);
+  keys.reserve(1);
   // Spawn workers
   auto f = std::bind(&CachePipelineRun::ReaderWorkerEntry, this, std::placeholders::_1);
   std::vector<Task *> worker_threads;
@@ -381,11 +377,9 @@ Status CachePipelineRun::RunReadEpoch() {
   int32_t worker_id = 0;
   for (auto id : all_keys) {
     keys.push_back(id);
-    if (keys.size() == rows_per_buffer) {
-      auto blk = std::make_unique<IOBlock>(IOBlock(keys, IOBlock::kDeIoBlockNone));
-      RETURN_IF_NOT_OK(io_block_queues_[worker_id++ % num_workers]->Add(std::move(blk)));
-      keys.clear();
-    }
+    auto blk = std::make_unique<IOBlock>(IOBlock(keys, IOBlock::kDeIoBlockNone));
+    RETURN_IF_NOT_OK(io_block_queues_[worker_id++ % num_workers]->Add(std::move(blk)));
+    keys.clear();
   }
   if (!keys.empty()) {
     auto blk = std::make_unique<IOBlock>(IOBlock(keys, IOBlock::kDeIoBlockNone));
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/barrier_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/barrier_op.cc
index af3d8defc3..935f93152d 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/barrier_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/barrier_op.cc
@@ -31,7 +31,6 @@ BarrierOp::Builder::Builder() {
   // using the various builder set methods.
 
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
-  builder_rows_per_buffer_ = cfg->rows_per_buffer();
   builder_op_connector_size_ = cfg->op_connector_size();
 }
 
@@ -39,17 +38,13 @@ Status BarrierOp::Builder::SanityCheck() const { return Status::OK(); }
 
 Status BarrierOp::Builder::Build(std::shared_ptr<BarrierOp> *ptr) {
   RETURN_IF_NOT_OK(SanityCheck());
-  *ptr = std::make_shared<BarrierOp>(builder_rows_per_buffer_, builder_op_connector_size_, builder_condition_name_,
-                                     builder_condition_func_);
+  *ptr = std::make_shared<BarrierOp>(builder_op_connector_size_, builder_condition_name_, builder_condition_func_);
   return Status::OK();
 }
 
 // Construct BarrierOp here, local variables initialized in operator due to tree construction restrictions
-BarrierOp::BarrierOp(int32_t rows_per_buffer, int32_t op_connector_size, const std::string &condition_name,
-                     py::function condition_func)
+BarrierOp::BarrierOp(int32_t op_connector_size, const std::string &condition_name, py::function condition_func)
     : PipelineOp(op_connector_size),
-      rows_per_buffer_(rows_per_buffer),
-      buffer_id_(0),
       clean_up_(false),
       eof_(false),
       condition_name_(condition_name),
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/barrier_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/barrier_op.h
index 6b13654db2..3df5fee858 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/barrier_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/barrier_op.h
@@ -98,16 +98,13 @@ class BarrierOp : public PipelineOp {
   };
 
   // Constructor for BarrierOp
-  // @param rows_per_buffer - number of rows in output buffer
   // @param op_connector_size - connector size
   // @param condition_name - the condition name associated with this operator
   // @param condition_func - the blocking condition check per row
-  // @note - currently rows_per_buffer should = 1 for barrier.
   // The reason for this is having other values would complicate how the pipeline behaves with other operators
   // One example of such case is having batch after barrier. Batch would be waiting for data and having
   // rows per buffer in this case can result in hanging
-  BarrierOp(int32_t rows_per_buffer, int32_t op_connector_size, const std::string &condition_name,
-            py::function condition_func);
+  BarrierOp(int32_t op_connector_size, const std::string &condition_name, py::function condition_func);
 
   // Destructor
   ~BarrierOp();
@@ -156,10 +153,6 @@ class BarrierOp : public PipelineOp {
   bool clean_up_;
   // end of file state, we stop reading data and shut down
   bool eof_;
-  // rows per buffer
-  int32_t rows_per_buffer_;
-  // buffer_id
-  int32_t buffer_id_;
   // iterator to pull new rows, we only have one child
   std::unique_ptr<ChildIterator> child_iterator_;
   // condition name, to support multiple barriers
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/batch_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/batch_op.cc
index ac402eec0d..c7c19ba5dd 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/batch_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/batch_op.cc
@@ -248,7 +248,7 @@ Status BatchOp::WorkerEntry(int32_t workerId) {
       RETURN_IF_NOT_OK(out_connector_->SendEOF(workerId));
     } else if (table_pair.second.ctrl_ == batchCtrl::kNoCtrl) {
       TensorRow new_row;
-      RETURN_IF_NOT_OK(MakeBatchedBuffer(std::move(table_pair), &new_row));
+      RETURN_IF_NOT_OK(MakeBatchedRow(std::move(table_pair), &new_row));
       RETURN_IF_NOT_OK(out_connector_->Add(std::move(new_row), workerId));
     }
     RETURN_IF_NOT_OK(worker_queues_[workerId]->PopFront(&table_pair));
@@ -256,7 +256,7 @@ Status BatchOp::WorkerEntry(int32_t workerId) {
   return Status::OK();
 }
 
-Status BatchOp::MakeBatchedBuffer(std::pair<std::unique_ptr<TensorQTable>, CBatchInfo> table_pair, TensorRow *new_row) {
+Status BatchOp::MakeBatchedRow(std::pair<std::unique_ptr<TensorQTable>, CBatchInfo> table_pair, TensorRow *new_row) {
   RETURN_UNEXPECTED_IF_NULL(table_pair.first);
 #ifdef ENABLE_PYTHON
   if (!in_col_names_.empty()) RETURN_IF_NOT_OK(MapColumns(&table_pair));  // pass it through pyfunc
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/batch_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/batch_op.h
index 454d9403e2..7f261a22d0 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/batch_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/batch_op.h
@@ -225,7 +225,7 @@ class BatchOp : public ParallelOp {
 
   // Generate buffer with batched tensors
   // @return Status The status code returned
-  Status MakeBatchedBuffer(std::pair<std::unique_ptr<TensorQTable>, CBatchInfo> table_pair, TensorRow *new_row);
+  Status MakeBatchedRow(std::pair<std::unique_ptr<TensorQTable>, CBatchInfo> table_pair, TensorRow *new_row);
 
 #ifdef ENABLE_PYTHON
   // Function that calls pyfunc to perform map on batch
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_base_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_base_op.cc
index 3150b06556..07914ef71f 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_base_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_base_op.cc
@@ -45,14 +45,13 @@ Status CacheBase::Reset() {
   MS_LOG(DEBUG) << Name() << " performing a self-reset.";
   return Status::OK();
 }
-CacheBase::CacheBase(int32_t num_workers, int32_t op_connector_size, int32_t rows_per_buf,
-                     std::shared_ptr<CacheClient> cache_client, std::shared_ptr<SamplerRT> sampler)
+CacheBase::CacheBase(int32_t num_workers, int32_t op_connector_size, std::shared_ptr<CacheClient> cache_client,
+                     std::shared_ptr<SamplerRT> sampler)
     : ParallelOp(num_workers, op_connector_size, std::move(sampler)),
       row_cnt_(0),
       num_cache_miss_(0),
       cache_client_(std::move(cache_client)),
-      rows_per_buffer_(rows_per_buf),
-      prefetch_size_(rows_per_buffer_),
+      prefetch_size_(1),
       num_prefetchers_(num_workers_) {
   // Adjust the prefetch size based on the number of workers.
   auto prefetch_sz_per_thread = cache_client_->GetPrefetchSize() / num_prefetchers_;
@@ -92,7 +91,7 @@ Status CacheBase::FetchSamplesToWorkers() {
     row_cnt_ = 0;
     ++wait_cnt;
     std::vector<row_id_type> keys;
-    keys.reserve(rows_per_buffer_);
+    keys.reserve(1);
     std::vector<row_id_type> prefetch_keys;
     prefetch_keys.reserve(prefetch_size_);
     std::unique_ptr<DataBuffer> sampler_buffer;
@@ -107,15 +106,11 @@ Status CacheBase::FetchSamplesToWorkers() {
         // Batch enough rows for performance reason.
         if (row_cnt_ % prefetch_size_ == 0) {
           RETURN_IF_NOT_OK(send_to_que(prefetch_queues_, prefetch_cnt++ % num_prefetchers_, prefetch_keys));
-          // Now we tell the WorkerEntry to wait for them to come back. If prefetch_size_ is a multiple
-          // of rows_per_buffer_, the keys vector will always be empty. But it can be partially filled.
-          // The only requirement we set up is rows_per_buffer_ is less than or equal to prefetch_size_.
+          // Now we tell the WorkerEntry to wait for them to come back.
           for (auto row_id : prefetch_keys) {
             keys.push_back(row_id);
-            if (keys.size() == rows_per_buffer_) {
-              RETURN_IF_NOT_OK(send_to_que(io_block_queues_, buf_cnt++ % num_workers_, keys));
-              keys.clear();
-            }
+            RETURN_IF_NOT_OK(send_to_que(io_block_queues_, buf_cnt++ % num_workers_, keys));
+            keys.clear();
           }
           prefetch_keys.clear();
         }
@@ -127,10 +122,8 @@ Status CacheBase::FetchSamplesToWorkers() {
       RETURN_IF_NOT_OK(send_to_que(prefetch_queues_, prefetch_cnt++ % num_prefetchers_, prefetch_keys));
       for (auto row_id : prefetch_keys) {
         keys.push_back(row_id);
-        if (keys.size() == rows_per_buffer_) {
-          RETURN_IF_NOT_OK(send_to_que(io_block_queues_, buf_cnt++ % num_workers_, keys));
-          keys.clear();
-        }
+        RETURN_IF_NOT_OK(send_to_que(io_block_queues_, buf_cnt++ % num_workers_, keys));
+        keys.clear();
       }
     }
     if (!keys.empty()) {
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_base_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_base_op.h
index f838b52c50..1494320b60 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_base_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_base_op.h
@@ -42,11 +42,10 @@ class CacheBase : public ParallelOp {
   /// \brief Base class constructor
   /// \param num_workers Number of parallel workers
   /// \param op_connector_size Connector size
-  /// \param rows_per_buf Number of rows per buffer
   /// \param cache_client CacheClient for communication to the CacheServer
   /// \param sampler Sampler which is mandatory
-  CacheBase(int32_t num_workers, int32_t op_connector_size, int32_t rows_per_buf,
-            std::shared_ptr<CacheClient> cache_client, std::shared_ptr<SamplerRT> sampler);
+  CacheBase(int32_t num_workers, int32_t op_connector_size, std::shared_ptr<CacheClient> cache_client,
+            std::shared_ptr<SamplerRT> sampler);
   /// \brief Destructor
   ~CacheBase();
 
@@ -87,7 +86,6 @@ class CacheBase : public ParallelOp {
   int64_t row_cnt_;
   std::atomic<int64_t> num_cache_miss_;
   std::shared_ptr<CacheClient> cache_client_;
-  int32_t rows_per_buffer_;
   std::unique_ptr<Connector<std::vector<row_id_type>>> keys_miss_;
 
   /// \brief Common function to register resources for interrupt
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_lookup_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_lookup_op.cc
index 53782e390b..d96b68e2dc 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_lookup_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_lookup_op.cc
@@ -31,7 +31,6 @@ namespace dataset {
 CacheLookupOp::Builder::Builder() : build_cache_client_(nullptr), build_sampler_(nullptr) {
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
   build_num_workers_ = cfg->num_parallel_workers();
-  rows_per_buffer_ = cfg->rows_per_buffer();
   build_op_connector_size_ = cfg->op_connector_size();
 }
 
@@ -52,8 +51,8 @@ Status CacheLookupOp::Builder::SanityCheck() const {
 // The builder "build" method creates the final object and does some init on it
 Status CacheLookupOp::Builder::Build(std::shared_ptr<CacheLookupOp> *ptr) {
   RETURN_IF_NOT_OK(SanityCheck());
-  *ptr = std::make_shared<CacheLookupOp>(build_num_workers_, build_op_connector_size_, rows_per_buffer_,
-                                         build_cache_client_, build_sampler_);
+  *ptr =
+    std::make_shared<CacheLookupOp>(build_num_workers_, build_op_connector_size_, build_cache_client_, build_sampler_);
   return Status::OK();
 }
 Status CacheLookupOp::operator()() {
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_lookup_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_lookup_op.h
index f3211ddd38..7e867d28f5 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_lookup_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_lookup_op.h
@@ -74,7 +74,6 @@ class CacheLookupOp : public CacheBase, public SamplerRT {
 
    private:
     int32_t build_num_workers_;
-    int32_t rows_per_buffer_;
     int32_t build_op_connector_size_;
     std::shared_ptr<CacheClient> build_cache_client_;
     std::shared_ptr<SamplerRT> build_sampler_;
@@ -86,9 +85,9 @@ class CacheLookupOp : public CacheBase, public SamplerRT {
   /// \brief Constructor
   /// \note It takes the same argument as the base class.
   /// \see CacheBase
-  CacheLookupOp(int32_t num_workers, int32_t op_connector_size, int32_t rows_per_buf,
-                std::shared_ptr<CacheClient> cache_client, std::shared_ptr<SamplerRT> sampler)
-      : CacheBase(num_workers, op_connector_size, rows_per_buf, cache_client, sampler), SamplerRT(*(sampler.get())) {}
+  CacheLookupOp(int32_t num_workers, int32_t op_connector_size, std::shared_ptr<CacheClient> cache_client,
+                std::shared_ptr<SamplerRT> sampler)
+      : CacheBase(num_workers, op_connector_size, cache_client, sampler), SamplerRT(*(sampler.get())) {}
   ~CacheLookupOp() = default;
   // As a parallel op, we override these two functions
   Status operator()() override;
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_op.cc
index cccf77f343..c05ac0f961 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_op.cc
@@ -33,7 +33,6 @@ namespace dataset {
 CacheOp::Builder::Builder() : build_cache_client_(nullptr), build_sampler_(nullptr) {
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
   build_num_workers_ = cfg->num_parallel_workers();
-  rows_per_buffer_ = cfg->rows_per_buffer();
   build_op_connector_size_ = cfg->op_connector_size();
 }
 
@@ -54,17 +53,16 @@ Status CacheOp::Builder::SanityCheck() const {
 // The builder "build" method creates the final object and does some init on it
 Status CacheOp::Builder::Build(std::shared_ptr<CacheOp> *ptr) {
   RETURN_IF_NOT_OK(SanityCheck());
-  *ptr = std::make_shared<CacheOp>(build_num_workers_, build_op_connector_size_, rows_per_buffer_, build_cache_client_,
-                                   build_sampler_);
+  *ptr = std::make_shared<CacheOp>(build_num_workers_, build_op_connector_size_, build_cache_client_, build_sampler_);
   RETURN_IF_NOT_OK((*ptr)->InitCache());
 
   return Status::OK();
 }
 
 // Constructor of CacheOp
-CacheOp::CacheOp(int32_t num_workers, int32_t op_connector_size, int32_t rows_per_buf,
-                 std::shared_ptr<CacheClient> cache_client, std::shared_ptr<SamplerRT> sampler)
-    : CacheBase(num_workers, op_connector_size, rows_per_buf, std::move(cache_client), std::move(sampler)),
+CacheOp::CacheOp(int32_t num_workers, int32_t op_connector_size, std::shared_ptr<CacheClient> cache_client,
+                 std::shared_ptr<SamplerRT> sampler)
+    : CacheBase(num_workers, op_connector_size, std::move(cache_client), std::move(sampler)),
       num_guys_in_(0),
       phase_(Phase::kBuildPhase) {}
 
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_op.h
index fd7045ca59..3017b2ffb5 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/cache_op.h
@@ -70,14 +70,6 @@ class CacheOp : public CacheBase, public RandomAccessOp {
       return *this;
     }
 
-    /// \brief Setter method
-    /// \param rows_per_buffer
-    /// \return Builder setter method returns reference to the builder.
-    Builder &SetRowsPerBuffer(int32_t rows_per_buffer) {
-      rows_per_buffer_ = rows_per_buffer;
-      return *this;
-    }
-
     /// \brief Setter method
     /// \param sampler
     /// \return Builder setter method returns reference to the builder.
@@ -93,7 +85,6 @@ class CacheOp : public CacheBase, public RandomAccessOp {
 
    private:
     int32_t build_num_workers_;
-    int32_t rows_per_buffer_;
     int32_t build_op_connector_size_;
     std::shared_ptr<CacheClient> build_cache_client_;
     std::shared_ptr<SamplerRT> build_sampler_;
@@ -107,8 +98,8 @@ class CacheOp : public CacheBase, public RandomAccessOp {
   /// \note The builder class should be used to call it.
   /// \param num_workers The number of worker threads.
   /// \param op_connector_size The size of each queue in the connector.
-  CacheOp(int32_t num_workers, int32_t op_connector_size, int32_t rows_per_buf,
-          std::shared_ptr<CacheClient> cache_client, std::shared_ptr<SamplerRT> sampler);
+  CacheOp(int32_t num_workers, int32_t op_connector_size, std::shared_ptr<CacheClient> cache_client,
+          std::shared_ptr<SamplerRT> sampler);
 
   // Destructor
   ~CacheOp();
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/shuffle_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/shuffle_op.cc
index 842468c892..4ddeed74a7 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/shuffle_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/shuffle_op.cc
@@ -41,7 +41,6 @@ constexpr int32_t ShuffleOp::kShuffleStateDrain;
 ShuffleOp::Builder::Builder() : build_shuffle_size_(0), build_reshuffle_each_epoch_(true) {
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
   build_op_connector_size_ = cfg->op_connector_size();
-  build_rows_per_buffer_ = cfg->rows_per_buffer();
   build_shuffle_seed_ = GetSeed();
 }
 
@@ -56,20 +55,17 @@ Status ShuffleOp::Builder::SanityCheck() const {
 Status ShuffleOp::Builder::Build(std::shared_ptr<ShuffleOp> *ptr) {
   RETURN_IF_NOT_OK(SanityCheck());
   *ptr = std::make_shared<ShuffleOp>(build_shuffle_size_, build_shuffle_seed_, build_op_connector_size_,
-                                     build_reshuffle_each_epoch_, build_rows_per_buffer_);
+                                     build_reshuffle_each_epoch_);
   return Status::OK();
 }
 
 // Constructor of the ShuffleOp
-ShuffleOp::ShuffleOp(int32_t shuffle_size, uint32_t shuffle_seed, int32_t op_connector_size, bool reset_every_epoch,
-                     int32_t rows_per_buffer)
+ShuffleOp::ShuffleOp(int32_t shuffle_size, uint32_t shuffle_seed, int32_t op_connector_size, bool reset_every_epoch)
     : PipelineOp(op_connector_size),
       shuffle_size_(shuffle_size),
       shuffle_seed_(shuffle_seed),
       reshuffle_each_epoch_(reset_every_epoch),
       rng_(shuffle_seed),
-      buffer_counter_(0),
-      rows_per_buffer_(rows_per_buffer),
       shuffle_buffer_(std::make_unique<TensorTable>()),
       shuffle_last_row_idx_(0),
       shuffle_buffer_state_(kShuffleStateInit) {}
@@ -87,7 +83,6 @@ Status ShuffleOp::SelfReset() {
   }
 
   shuffle_buffer_ = std::make_unique<TensorTable>();
-  buffer_counter_ = 0;
   shuffle_last_row_idx_ = 0;
   shuffle_buffer_state_ = kShuffleStateInit;
   return Status::OK();
@@ -104,8 +99,8 @@ void ShuffleOp::Print(std::ostream &out, bool show_all) const {
     // Call the super class for displaying any common detailed info
     PipelineOp::Print(out, show_all);
     // Then show any custom derived-internal stuff
-    out << "\nShuffle size: " << shuffle_size_ << "\nRows per buffer: " << rows_per_buffer_
-        << "\nShuffle buffer state: " << shuffle_buffer_state_ << "\nShuffle seed: " << shuffle_seed_ << "\n\n";
+    out << "\nShuffle size: " << shuffle_size_ << "\nShuffle buffer state: " << shuffle_buffer_state_
+        << "\nShuffle seed: " << shuffle_seed_ << "\n\n";
   }
 }
 
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/shuffle_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/shuffle_op.h
index 9b733a7981..253d3d65e9 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/shuffle_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/shuffle_op.h
@@ -121,9 +121,7 @@ class ShuffleOp : public PipelineOp {
   // @param shuffle_size - The size for the shuffle buffer
   // @param shuffle_seed - The seed to use for random number generation
   // @param op_connector_size - The output connector queue size
-  // @param rows_per_buffer - The requested number of rows per buffer
-  ShuffleOp(int32_t shuffle_size, uint32_t shuffle_seed, int32_t op_connector_size, bool reset_every_epoch,
-            int32_t rows_per_buffer);
+  ShuffleOp(int32_t shuffle_size, uint32_t shuffle_seed, int32_t op_connector_size, bool reset_every_epoch);
 
   // Destructor
   ~ShuffleOp() = default;
@@ -183,8 +181,6 @@ class ShuffleOp : public PipelineOp {
   // (ie uniform_int_distribution) because we will need to create up to |dataset| instances
   // of the distribution object in the common case of a perfect shuffle
   std::mt19937_64 rng_;
-  int32_t buffer_counter_;   // For creating new buffer id's
-  int32_t rows_per_buffer_;  // Number of rows to pack into output buffer
   // A single (potentially large) buffer of tensor rows for performing shuffling.
   std::unique_ptr<TensorTable> shuffle_buffer_;
   int32_t shuffle_last_row_idx_;  // Internal tracking of the last slot of our shuffle buffer
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/album_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/album_op.cc
index 968afc0b70..229ef94e20 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/album_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/album_op.cc
@@ -32,7 +32,6 @@ namespace dataset {
 AlbumOp::Builder::Builder() : builder_decode_(false), builder_sampler_(nullptr) {
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
   builder_num_workers_ = cfg->num_parallel_workers();
-  builder_rows_per_buffer_ = cfg->rows_per_buffer();
   builder_op_connector_size_ = cfg->op_connector_size();
 }
 
@@ -52,9 +51,8 @@ Status AlbumOp::Builder::Build(std::shared_ptr<AlbumOp> *ptr) {
     MS_LOG(INFO) << "Schema file provided: " << builder_schema_file_ << ".";
     builder_schema_->LoadSchemaFile(builder_schema_file_, builder_columns_to_load_);
   }
-  *ptr = std::make_shared<AlbumOp>(builder_num_workers_, builder_rows_per_buffer_, builder_dir_,
-                                   builder_op_connector_size_, builder_decode_, builder_extensions_,
-                                   std::move(builder_schema_), std::move(builder_sampler_));
+  *ptr = std::make_shared<AlbumOp>(builder_num_workers_, builder_dir_, builder_op_connector_size_, builder_decode_,
+                                   builder_extensions_, std::move(builder_schema_), std::move(builder_sampler_));
   return Status::OK();
 }
 
@@ -69,10 +67,10 @@ Status AlbumOp::Builder::SanityCheck() {
   return err_msg.empty() ? Status::OK() : Status(StatusCode::kMDUnexpectedError, __LINE__, __FILE__, err_msg);
 }
 
-AlbumOp::AlbumOp(int32_t num_wkrs, int32_t rows_per_buffer, std::string file_dir, int32_t queue_size, bool do_decode,
+AlbumOp::AlbumOp(int32_t num_wkrs, std::string file_dir, int32_t queue_size, bool do_decode,
                  const std::set<std::string> &exts, std::unique_ptr<DataSchema> data_schema,
                  std::shared_ptr<SamplerRT> sampler)
-    : MappableLeafOp(num_wkrs, queue_size, std::move(sampler), rows_per_buffer),
+    : MappableLeafOp(num_wkrs, queue_size, std::move(sampler)),
       folder_path_(file_dir),
       decode_(do_decode),
       extensions_(exts),
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/album_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/album_op.h
index bfe88760cb..9442ea86bf 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/album_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/album_op.h
@@ -58,14 +58,6 @@ class AlbumOp : public MappableLeafOp {
     /// \brief Destructor.
     ~Builder() = default;
 
-    /// \brief Setter method
-    /// \param[in] rows_per_buffer
-    /// \return Builder setter method returns reference to the builder
-    Builder &SetRowsPerBuffer(int32_t rows_per_buffer) {
-      builder_rows_per_buffer_ = rows_per_buffer;
-      return *this;
-    }
-
     /// \brief Setter method
     /// \param[in] size
     /// \return Builder setter method returns reference to the builder
@@ -154,16 +146,14 @@ class AlbumOp : public MappableLeafOp {
 
   /// \brief Constructor
   /// \param[in] num_wkrs - Num of workers reading images in parallel
-  /// \param[in] rows_per_buffer Number of images (rows) in each buffer
   /// \param[in] file_dir - directory of Album
   /// \param[in] queue_size - connector size
   /// \param[in] do_decode - decode image files
   /// \param[in] exts - set of file extensions to read, if empty, read everything under the dir
   /// \param[in] data_schema - schema of dataset
   /// \param[in] sampler - sampler tells AlbumOp what to read
-  AlbumOp(int32_t num_wkrs, int32_t rows_per_buffer, std::string file_dir, int32_t queue_size, bool do_decode,
-          const std::set<std::string> &exts, std::unique_ptr<DataSchema> data_schema,
-          std::shared_ptr<SamplerRT> sampler);
+  AlbumOp(int32_t num_wkrs, std::string file_dir, int32_t queue_size, bool do_decode, const std::set<std::string> &exts,
+          std::unique_ptr<DataSchema> data_schema, std::shared_ptr<SamplerRT> sampler);
 
   /// \brief Destructor.
   ~AlbumOp() = default;
@@ -273,7 +263,6 @@ class AlbumOp : public MappableLeafOp {
   /// \return Status The status code returned
   Status ComputeColMap() override;
 
-  int32_t rows_per_buffer_;
   std::string folder_path_;  // directory of image folder
   bool decode_;
   std::set<std::string> extensions_;  // extensions allowed
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/celeba_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/celeba_op.cc
index 33ed0f1241..93a0450244 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/celeba_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/celeba_op.cc
@@ -34,7 +34,6 @@ namespace dataset {
 CelebAOp::Builder::Builder() : builder_decode_(false), builder_sampler_(nullptr) {
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
   builder_num_workers_ = cfg->num_parallel_workers();
-  builder_rows_per_buffer_ = cfg->rows_per_buffer();
   builder_op_connector_size_ = cfg->op_connector_size();
 }
 
@@ -54,9 +53,9 @@ Status CelebAOp::Builder::Build(std::shared_ptr<CelebAOp> *op) {
   // label is like this:0 1 0 0 1......
   RETURN_IF_NOT_OK(
     builder_schema_->AddColumn(ColDescriptor("attr", DataType(DataType::DE_UINT32), TensorImpl::kFlexible, 1)));
-  *op = std::make_shared<CelebAOp>(builder_num_workers_, builder_rows_per_buffer_, builder_dir_,
-                                   builder_op_connector_size_, builder_decode_, builder_usage_, builder_extensions_,
-                                   std::move(builder_schema_), std::move(builder_sampler_));
+  *op = std::make_shared<CelebAOp>(builder_num_workers_, builder_dir_, builder_op_connector_size_, builder_decode_,
+                                   builder_usage_, builder_extensions_, std::move(builder_schema_),
+                                   std::move(builder_sampler_));
   if (*op == nullptr) {
     return Status(StatusCode::kMDUnexpectedError, __LINE__, __FILE__, "CelebAOp init failed.");
   }
@@ -76,10 +75,10 @@ Status CelebAOp::Builder::SanityCheck() {
   return err_msg.empty() ? Status::OK() : Status(StatusCode::kMDUnexpectedError, __LINE__, __FILE__, err_msg);
 }
 
-CelebAOp::CelebAOp(int32_t num_workers, int32_t rows_per_buffer, const std::string &dir, int32_t queue_size,
-                   bool decode, const std::string &usage, const std::set<std::string> &exts,
-                   std::unique_ptr<DataSchema> schema, std::shared_ptr<SamplerRT> sampler)
-    : MappableLeafOp(num_workers, queue_size, std::move(sampler), rows_per_buffer),
+CelebAOp::CelebAOp(int32_t num_workers, const std::string &dir, int32_t queue_size, bool decode,
+                   const std::string &usage, const std::set<std::string> &exts, std::unique_ptr<DataSchema> schema,
+                   std::shared_ptr<SamplerRT> sampler)
+    : MappableLeafOp(num_workers, queue_size, std::move(sampler)),
       folder_path_(dir),
       decode_(decode),
       extensions_(exts),
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/celeba_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/celeba_op.h
index c2375fc62a..ea980ab419 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/celeba_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/celeba_op.h
@@ -53,14 +53,6 @@ class CelebAOp : public MappableLeafOp {
     // Destructor.
     ~Builder() = default;
 
-    // Setter method
-    // @param int32_t rows_per_buffer
-    // @return Builder setter method returns reference to the builder.
-    Builder &SetRowsPerBuffer(int32_t rows_per_buffer) {
-      builder_rows_per_buffer_ = rows_per_buffer;
-      return *this;
-    }
-
     // Setter method
     // @param int32_t size
     // @return Builder setter method returns reference to the builder.
@@ -139,13 +131,11 @@ class CelebAOp : public MappableLeafOp {
 
   // Constructor
   // @param int32_t - num_workers - Num of workers reading images in parallel
-  // @param int32_t - rows_per_buffer Number of images (rows) in each buffer
   // @param std::string - dir directory of celeba dataset
   // @param int32_t queueSize - connector queue size
   // @param std::unique_ptr<Sampler> sampler - sampler tells CelebAOp what to read
-  CelebAOp(int32_t num_workers, int32_t rows_per_buffer, const std::string &dir, int32_t queue_size, bool decode,
-           const std::string &usage, const std::set<std::string> &exts, std::unique_ptr<DataSchema> schema,
-           std::shared_ptr<SamplerRT> sampler);
+  CelebAOp(int32_t num_workers, const std::string &dir, int32_t queue_size, bool decode, const std::string &usage,
+           const std::set<std::string> &exts, std::unique_ptr<DataSchema> schema, std::shared_ptr<SamplerRT> sampler);
 
   ~CelebAOp() override = default;
 
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/cifar_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/cifar_op.cc
index 585b22547b..50b8468260 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/cifar_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/cifar_op.cc
@@ -39,7 +39,6 @@ constexpr uint32_t kCifarImageSize = kCifarImageHeight * kCifarImageWidth * kCif
 CifarOp::Builder::Builder() : sampler_(nullptr), usage_("") {
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
   num_workers_ = cfg->num_parallel_workers();
-  rows_per_buffer_ = cfg->rows_per_buffer();
   op_connect_size_ = cfg->op_connector_size();
   cifar_type_ = kCifar10;
 }
@@ -65,8 +64,8 @@ Status CifarOp::Builder::Build(std::shared_ptr<CifarOp> *ptr) {
       ColDescriptor("fine_label", DataType(DataType::DE_UINT32), TensorImpl::kFlexible, 0, &another_scalar)));
   }
 
-  *ptr = std::make_shared<CifarOp>(cifar_type_, usage_, num_workers_, rows_per_buffer_, dir_, op_connect_size_,
-                                   std::move(schema_), std::move(sampler_));
+  *ptr = std::make_shared<CifarOp>(cifar_type_, usage_, num_workers_, dir_, op_connect_size_, std::move(schema_),
+                                   std::move(sampler_));
   return Status::OK();
 }
 
@@ -85,10 +84,9 @@ Status CifarOp::Builder::SanityCheck() {
   return err_msg.empty() ? Status::OK() : Status(StatusCode::kMDUnexpectedError, __LINE__, __FILE__, err_msg);
 }
 
-CifarOp::CifarOp(CifarType type, const std::string &usage, int32_t num_works, int32_t rows_per_buf,
-                 const std::string &file_dir, int32_t queue_size, std::unique_ptr<DataSchema> data_schema,
-                 std::shared_ptr<SamplerRT> sampler)
-    : MappableLeafOp(num_works, queue_size, std::move(sampler), rows_per_buf),
+CifarOp::CifarOp(CifarType type, const std::string &usage, int32_t num_works, const std::string &file_dir,
+                 int32_t queue_size, std::unique_ptr<DataSchema> data_schema, std::shared_ptr<SamplerRT> sampler)
+    : MappableLeafOp(num_works, queue_size, std::move(sampler)),
       cifar_type_(type),
       usage_(usage),
       folder_path_(file_dir),
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/cifar_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/cifar_op.h
index ff80d6c104..993638d95a 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/cifar_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/cifar_op.h
@@ -49,14 +49,6 @@ class CifarOp : public MappableLeafOp {
     // Destructor.
     ~Builder() = default;
 
-    // Setter method
-    // @param uint32_t rows_per_buffer
-    // @return Builder setter method returns reference to the builder.
-    Builder &SetRowsPerBuffer(int32_t rows_per_buffer) {
-      rows_per_buffer_ = rows_per_buffer;
-      return *this;
-    }
-
     // Setter method
     // @param uint32_t size
     // @return Builder setter method returns reference to the builder.
@@ -122,7 +114,6 @@ class CifarOp : public MappableLeafOp {
     std::string dir_;
     std::string usage_;
     int32_t num_workers_;
-    int32_t rows_per_buffer_;
     int32_t op_connect_size_;
     std::shared_ptr<SamplerRT> sampler_;
     std::unique_ptr<DataSchema> schema_;
@@ -133,13 +124,11 @@ class CifarOp : public MappableLeafOp {
   // @param CifarType type - Cifar10 or Cifar100
   // @param const std::string &usage - Usage of this dataset, can be 'train', 'test' or 'all'
   // @param uint32_t numWorks - Num of workers reading images in parallel
-  // @param uint32_t - rowsPerBuffer Number of images (rows) in each buffer
   // @param std::string - dir directory of cifar dataset
   // @param uint32_t - queueSize - connector queue size
   // @param std::unique_ptr<Sampler> sampler - sampler tells ImageFolderOp what to read
-  CifarOp(CifarType type, const std::string &usage, int32_t num_works, int32_t rows_per_buf,
-          const std::string &file_dir, int32_t queue_size, std::unique_ptr<DataSchema> data_schema,
-          std::shared_ptr<SamplerRT> sampler);
+  CifarOp(CifarType type, const std::string &usage, int32_t num_works, const std::string &file_dir, int32_t queue_size,
+          std::unique_ptr<DataSchema> data_schema, std::shared_ptr<SamplerRT> sampler);
   // Destructor.
   ~CifarOp() = default;
 
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/clue_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/clue_op.cc
index 76b43176e3..6d088d73ea 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/clue_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/clue_op.cc
@@ -36,7 +36,6 @@ ClueOp::Builder::Builder()
   std::shared_ptr<ConfigManager> config_manager = GlobalContext::config_manager();
   builder_num_workers_ = config_manager->num_parallel_workers();
   builder_op_connector_size_ = config_manager->op_connector_size();
-  builder_rows_per_buffer_ = config_manager->rows_per_buffer();
   builder_worker_connector_size_ = config_manager->worker_connector_size();
 }
 
@@ -67,9 +66,8 @@ Status ClueOp::Builder::Build(std::shared_ptr<ClueOp> *op) {
   }
 
   std::shared_ptr<ClueOp> clue_op = std::make_shared<ClueOp>(
-    builder_num_workers_, builder_rows_per_buffer_, builder_num_samples_, builder_worker_connector_size_, ck_map,
-    builder_clue_files_list_, builder_op_connector_size_, builder_shuffle_files_, builder_num_devices_,
-    builder_device_id_);
+    builder_num_workers_, builder_num_samples_, builder_worker_connector_size_, ck_map, builder_clue_files_list_,
+    builder_op_connector_size_, builder_shuffle_files_, builder_num_devices_, builder_device_id_);
   RETURN_IF_NOT_OK(clue_op->Init());
   *op = std::move(clue_op);
 
@@ -87,11 +85,11 @@ std::vector<std::string> ClueOp::Builder::split(const std::string &s, char delim
   return res;
 }
 
-ClueOp::ClueOp(int32_t num_workers, int64_t rows_per_buffer, int64_t num_samples, int32_t worker_connector_size,
-               ColKeyMap cols_to_keyword, std::vector<std::string> clue_files_list, int32_t op_connector_size,
-               bool shuffle_files, int32_t num_devices, int32_t device_id)
-    : NonMappableLeafOp(num_workers, worker_connector_size, rows_per_buffer, num_samples, op_connector_size,
-                        shuffle_files, num_devices, device_id),
+ClueOp::ClueOp(int32_t num_workers, int64_t num_samples, int32_t worker_connector_size, ColKeyMap cols_to_keyword,
+               std::vector<std::string> clue_files_list, int32_t op_connector_size, bool shuffle_files,
+               int32_t num_devices, int32_t device_id)
+    : NonMappableLeafOp(num_workers, worker_connector_size, num_samples, op_connector_size, shuffle_files, num_devices,
+                        device_id),
       clue_files_list_(std::move(clue_files_list)),
       cols_to_keyword_(cols_to_keyword) {}
 
@@ -200,8 +198,7 @@ void ClueOp::Print(std::ostream &out, bool show_all) const {
     // Call the super class for displaying any common detailed info
     ParallelOp::Print(out, show_all);
     // Then show any custom derived-internal stuff
-    out << "\nRows per buffer: " << rows_per_buffer_ << "\nSample count: " << total_rows_
-        << "\nDevice id: " << device_id_ << "\nNumber of devices: " << num_devices_
+    out << "\nSample count: " << total_rows_ << "\nDevice id: " << device_id_ << "\nNumber of devices: " << num_devices_
         << "\nShuffle files: " << ((shuffle_files_) ? "yes" : "no") << "\nClue files list:\n";
     for (int i = 0; i < clue_files_list_.size(); ++i) {
       out << " " << clue_files_list_[i];
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/clue_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/clue_op.h
index 1519452d1a..fb5df5080b 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/clue_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/clue_op.h
@@ -138,9 +138,9 @@ class ClueOp : public NonMappableLeafOp {
   };
 
   // Constructor of ClueOp
-  ClueOp(int32_t num_workers, int64_t rows_per_buffer, int64_t num_samples, int32_t worker_connector_size,
-         ColKeyMap cols_to_keyword, std::vector<std::string> clue_files_list, int32_t op_connector_size,
-         bool shuffle_files, int32_t num_devices, int32_t device_id);
+  ClueOp(int32_t num_workers, int64_t num_samples, int32_t worker_connector_size, ColKeyMap cols_to_keyword,
+         std::vector<std::string> clue_files_list, int32_t op_connector_size, bool shuffle_files, int32_t num_devices,
+         int32_t device_id);
 
   // Default destructor
   ~ClueOp() = default;
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/coco_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/coco_op.cc
index c2dfaf6ec8..64d9875a92 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/coco_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/coco_op.cc
@@ -50,7 +50,6 @@ const unsigned int kPadValueZero = 0;
 CocoOp::Builder::Builder() : builder_decode_(false), builder_sampler_(nullptr) {
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
   builder_num_workers_ = cfg->num_parallel_workers();
-  builder_rows_per_buffer_ = cfg->rows_per_buffer();
   builder_op_connector_size_ = cfg->op_connector_size();
   builder_task_type_ = TaskType::Detection;
 }
@@ -100,8 +99,8 @@ Status CocoOp::Builder::Build(std::shared_ptr<CocoOp> *ptr) {
       RETURN_STATUS_UNEXPECTED("Invalid parameter, task type should be Detection, Stuff, Keypoint or Panoptic.");
   }
   *ptr = std::make_shared<CocoOp>(builder_task_type_, builder_dir_, builder_file_, builder_num_workers_,
-                                  builder_rows_per_buffer_, builder_op_connector_size_, builder_decode_,
-                                  std::move(builder_schema_), std::move(builder_sampler_));
+                                  builder_op_connector_size_, builder_decode_, std::move(builder_schema_),
+                                  std::move(builder_sampler_));
   return Status::OK();
 }
 
@@ -122,9 +121,9 @@ Status CocoOp::Builder::SanityCheck() {
 }
 
 CocoOp::CocoOp(const TaskType &task_type, const std::string &image_folder_path, const std::string &annotation_path,
-               int32_t num_workers, int32_t rows_per_buffer, int32_t queue_size, bool decode,
-               std::unique_ptr<DataSchema> data_schema, std::shared_ptr<SamplerRT> sampler)
-    : MappableLeafOp(num_workers, queue_size, std::move(sampler), rows_per_buffer),
+               int32_t num_workers, int32_t queue_size, bool decode, std::unique_ptr<DataSchema> data_schema,
+               std::shared_ptr<SamplerRT> sampler)
+    : MappableLeafOp(num_workers, queue_size, std::move(sampler)),
       decode_(decode),
       task_type_(task_type),
       image_folder_path_(image_folder_path),
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/coco_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/coco_op.h
index bd6cd99adb..29e04ee396 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/coco_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/coco_op.h
@@ -109,14 +109,6 @@ class CocoOp : public MappableLeafOp {
       return *this;
     }
 
-    // Setter method.
-    // @param int32_t rows_per_buffer
-    // @return Builder setter method returns reference to the builder.
-    Builder &SetRowsPerBuffer(int32_t rows_per_buffer) {
-      builder_rows_per_buffer_ = rows_per_buffer;
-      return *this;
-    }
-
     // Setter method.
     // @param std::shared_ptr<Sampler> sampler
     // @return Builder setter method returns reference to the builder.
@@ -159,15 +151,14 @@ class CocoOp : public MappableLeafOp {
   // @param std::string image_folder_path - image folder path of Coco
   // @param std::string annotation_path - annotation json path of Coco
   // @param int32_t num_workers - number of workers reading images in parallel
-  // @param int32_t rows_per_buffer - number of images (rows) in each buffer
   // @param int32_t queue_size - connector queue size
   // @param int64_t num_samples - number of samples to read
   // @param bool decode - whether to decode images
   // @param std::unique_ptr<DataSchema> data_schema - the schema of the Coco dataset
   // @param std::shared_ptr<Sampler> sampler - sampler tells CocoOp what to read
   CocoOp(const TaskType &task_type, const std::string &image_folder_path, const std::string &annotation_path,
-         int32_t num_workers, int32_t rows_per_buffer, int32_t queue_size, bool decode,
-         std::unique_ptr<DataSchema> data_schema, std::shared_ptr<SamplerRT> sampler);
+         int32_t num_workers, int32_t queue_size, bool decode, std::unique_ptr<DataSchema> data_schema,
+         std::shared_ptr<SamplerRT> sampler);
 
   // Destructor
   ~CocoOp() = default;
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/csv_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/csv_op.cc
index 801844741a..17a24dab4d 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/csv_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/csv_op.cc
@@ -32,7 +32,6 @@ CsvOp::Builder::Builder()
   std::shared_ptr<ConfigManager> config_manager = GlobalContext::config_manager();
   builder_num_workers_ = config_manager->num_parallel_workers();
   builder_op_connector_size_ = config_manager->op_connector_size();
-  builder_rows_per_buffer_ = config_manager->rows_per_buffer();
   builder_worker_connector_size_ = config_manager->worker_connector_size();
 }
 
@@ -59,8 +58,8 @@ Status CsvOp::Builder::Build(std::shared_ptr<CsvOp> *op) {
 
   std::shared_ptr<CsvOp> csv_op = std::make_shared<CsvOp>(
     builder_csv_files_list_, builder_field_delim_, builder_column_default_list_, builder_column_name_list_,
-    builder_num_workers_, builder_rows_per_buffer_, builder_num_samples_, builder_worker_connector_size_,
-    builder_op_connector_size_, builder_shuffle_files_, builder_num_devices_, builder_device_id_);
+    builder_num_workers_, builder_num_samples_, builder_worker_connector_size_, builder_op_connector_size_,
+    builder_shuffle_files_, builder_num_devices_, builder_device_id_);
   RETURN_IF_NOT_OK(csv_op->Init());
   *op = std::move(csv_op);
 
@@ -69,11 +68,11 @@ Status CsvOp::Builder::Build(std::shared_ptr<CsvOp> *op) {
 
 CsvOp::CsvOp(const std::vector<std::string> &csv_files_list, char field_delim,
              const std::vector<std::shared_ptr<BaseRecord>> &column_default,
-             const std::vector<std::string> &column_name, int32_t num_workers, int64_t rows_per_buffer,
-             int64_t num_samples, int32_t worker_connector_size, int32_t op_connector_size, bool shuffle_files,
-             int32_t num_devices, int32_t device_id)
-    : NonMappableLeafOp(num_workers, worker_connector_size, rows_per_buffer, num_samples, op_connector_size,
-                        shuffle_files, num_devices, device_id),
+             const std::vector<std::string> &column_name, int32_t num_workers, int64_t num_samples,
+             int32_t worker_connector_size, int32_t op_connector_size, bool shuffle_files, int32_t num_devices,
+             int32_t device_id)
+    : NonMappableLeafOp(num_workers, worker_connector_size, num_samples, op_connector_size, shuffle_files, num_devices,
+                        device_id),
       csv_files_list_(std::move(csv_files_list)),
       field_delim_(field_delim),
       column_default_list_(column_default),
@@ -91,11 +90,10 @@ Status CsvOp::Init() {
   return Status::OK();
 }
 
-CsvOp::CsvParser::CsvParser(int32_t worker_id, JaggedConnector *connector, int64_t rows_per_buffer, char field_delim,
+CsvOp::CsvParser::CsvParser(int32_t worker_id, JaggedConnector *connector, char field_delim,
                             std::vector<std::shared_ptr<CsvOp::BaseRecord>> column_default, std::string file_path)
     : worker_id_(worker_id),
       buffer_connector_(connector),
-      csv_rows_per_buffer_(rows_per_buffer),
       csv_field_delim_(field_delim),
       column_default_(column_default),
       file_path_(file_path),
@@ -469,8 +467,7 @@ Status CsvOp::CsvParser::InitCsvParser() {
 }
 
 Status CsvOp::LoadFile(const std::string &file, int64_t start_offset, int64_t end_offset, int32_t worker_id) {
-  CsvParser csv_parser(worker_id, jagged_buffer_connector_.get(), rows_per_buffer_, field_delim_, column_default_list_,
-                       file);
+  CsvParser csv_parser(worker_id, jagged_buffer_connector_.get(), field_delim_, column_default_list_, file);
   csv_parser.SetStartOffset(start_offset);
   csv_parser.SetEndOffset(end_offset);
   std::ifstream ifs;
@@ -516,8 +513,7 @@ void CsvOp::Print(std::ostream &out, bool show_all) const {
     // Call the super class for displaying any common detailed info
     ParallelOp::Print(out, show_all);
     // Then show any custom derived-internal stuff
-    out << "\nRows per buffer: " << rows_per_buffer_ << "\nSample count: " << total_rows_
-        << "\nDevice id: " << device_id_ << "\nNumber of devices: " << num_devices_
+    out << "\nSample count: " << total_rows_ << "\nDevice id: " << device_id_ << "\nNumber of devices: " << num_devices_
         << "\nShuffle files: " << ((shuffle_files_) ? "yes" : "no") << "\nCsv files list:\n";
     for (int i = 0; i < csv_files_list_.size(); ++i) {
       out << " " << csv_files_list_[i];
@@ -592,7 +588,7 @@ Status CsvOp::CalculateNumRowsPerShard() {
 }
 
 int64_t CsvOp::CountTotalRows(const std::string &file) {
-  CsvParser csv_parser(0, jagged_buffer_connector_.get(), rows_per_buffer_, field_delim_, column_default_list_, file);
+  CsvParser csv_parser(0, jagged_buffer_connector_.get(), field_delim_, column_default_list_, file);
   std::ifstream ifs;
   ifs.open(file, std::ifstream::in);
   if (!ifs.is_open()) {
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/csv_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/csv_op.h
index a6a61c3501..ce019229e9 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/csv_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/csv_op.h
@@ -65,7 +65,7 @@ class CsvOp : public NonMappableLeafOp {
    public:
     CsvParser() = delete;
 
-    CsvParser(int32_t worker_id, JaggedConnector *connector, int64_t rows_per_buffer, char field_delim,
+    CsvParser(int32_t worker_id, JaggedConnector *connector, char field_delim,
               std::vector<std::shared_ptr<CsvOp::BaseRecord>> column_default, std::string file_path);
 
     ~CsvParser() = default;
@@ -128,7 +128,6 @@ class CsvOp : public NonMappableLeafOp {
 
     int32_t worker_id_;
     JaggedConnector *buffer_connector_;
-    int64_t csv_rows_per_buffer_;
     const char csv_field_delim_;
     std::vector<std::shared_ptr<CsvOp::BaseRecord>> column_default_;
     State cur_state_;
@@ -261,8 +260,8 @@ class CsvOp : public NonMappableLeafOp {
 
   CsvOp(const std::vector<std::string> &csv_files_list, char field_delim,
         const std::vector<std::shared_ptr<BaseRecord>> &column_default, const std::vector<std::string> &column_name,
-        int32_t num_workers, int64_t rows_per_buffer, int64_t num_samples, int32_t worker_connector_size,
-        int32_t op_connector_size, bool shuffle_files, int32_t num_devices, int32_t device_id);
+        int32_t num_workers, int64_t num_samples, int32_t worker_connector_size, int32_t op_connector_size,
+        bool shuffle_files, int32_t num_devices, int32_t device_id);
 
   // Default destructor
   ~CsvOp() = default;
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/image_folder_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/image_folder_op.cc
index 81b56c82da..48e24d6840 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/image_folder_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/image_folder_op.cc
@@ -28,7 +28,6 @@ namespace dataset {
 ImageFolderOp::Builder::Builder() : builder_decode_(false), builder_recursive_(false), builder_sampler_(nullptr) {
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
   builder_num_workers_ = cfg->num_parallel_workers();
-  builder_rows_per_buffer_ = cfg->rows_per_buffer();
   builder_op_connector_size_ = cfg->op_connector_size();
 }
 
@@ -45,10 +44,9 @@ Status ImageFolderOp::Builder::Build(std::shared_ptr<ImageFolderOp> *ptr) {
     builder_schema_->AddColumn(ColDescriptor("image", DataType(DataType::DE_UINT8), TensorImpl::kFlexible, 1)));
   RETURN_IF_NOT_OK(builder_schema_->AddColumn(
     ColDescriptor("label", DataType(DataType::DE_INT32), TensorImpl::kFlexible, 0, &scalar)));
-  *ptr = std::make_shared<ImageFolderOp>(builder_num_workers_, builder_rows_per_buffer_, builder_dir_,
-                                         builder_op_connector_size_, builder_recursive_, builder_decode_,
-                                         builder_extensions_, builder_labels_to_read_, std::move(builder_schema_),
-                                         std::move(builder_sampler_));
+  *ptr = std::make_shared<ImageFolderOp>(
+    builder_num_workers_, builder_dir_, builder_op_connector_size_, builder_recursive_, builder_decode_,
+    builder_extensions_, builder_labels_to_read_, std::move(builder_schema_), std::move(builder_sampler_));
   return Status::OK();
 }
 
@@ -64,11 +62,10 @@ Status ImageFolderOp::Builder::SanityCheck() {
   return err_msg.empty() ? Status::OK() : Status(StatusCode::kMDUnexpectedError, __LINE__, __FILE__, err_msg);
 }
 
-ImageFolderOp::ImageFolderOp(int32_t num_wkrs, int32_t rows_per_buffer, std::string file_dir, int32_t queue_size,
-                             bool recursive, bool do_decode, const std::set<std::string> &exts,
-                             const std::map<std::string, int32_t> &map, std::unique_ptr<DataSchema> data_schema,
-                             std::shared_ptr<SamplerRT> sampler)
-    : MappableLeafOp(num_wkrs, queue_size, std::move(sampler), rows_per_buffer),
+ImageFolderOp::ImageFolderOp(int32_t num_wkrs, std::string file_dir, int32_t queue_size, bool recursive, bool do_decode,
+                             const std::set<std::string> &exts, const std::map<std::string, int32_t> &map,
+                             std::unique_ptr<DataSchema> data_schema, std::shared_ptr<SamplerRT> sampler)
+    : MappableLeafOp(num_wkrs, queue_size, std::move(sampler)),
       folder_path_(file_dir),
       recursive_(recursive),
       decode_(do_decode),
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/image_folder_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/image_folder_op.h
index 1cf6b366a5..32f742e47b 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/image_folder_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/image_folder_op.h
@@ -63,14 +63,6 @@ class ImageFolderOp : public MappableLeafOp {
     // Destructor.
     ~Builder() = default;
 
-    // Setter method
-    // @param int32_t rows_per_buffer
-    // @return Builder setter method returns reference to the builder.
-    Builder &SetRowsPerBuffer(int32_t rows_per_buffer) {
-      builder_rows_per_buffer_ = rows_per_buffer;
-      return *this;
-    }
-
     // Setter method
     // @param int32_t size
     // @return Builder setter method returns reference to the builder.
@@ -159,13 +151,12 @@ class ImageFolderOp : public MappableLeafOp {
 
   // Constructor
   // @param int32_t num_wkrs - Num of workers reading images in parallel
-  // @param int32_t - rows_per_buffer Number of images (rows) in each buffer
   // @param std::string - dir directory of ImageNetFolder
   // @param int32_t queue_size - connector queue size
   // @param std::set<std::string> exts - set of file extensions to read, if empty, read everything under the dir
   // @param td::unique_ptr<Sampler> sampler - sampler tells ImageFolderOp what to read
-  ImageFolderOp(int32_t num_wkrs, int32_t rows_per_buffer, std::string file_dir, int32_t queue_size, bool recursive,
-                bool do_decode, const std::set<std::string> &exts, const std::map<std::string, int32_t> &map,
+  ImageFolderOp(int32_t num_wkrs, std::string file_dir, int32_t queue_size, bool recursive, bool do_decode,
+                const std::set<std::string> &exts, const std::map<std::string, int32_t> &map,
                 std::unique_ptr<DataSchema>, std::shared_ptr<SamplerRT> sampler);
 
   // Destructor.
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/manifest_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/manifest_op.cc
index 3c57e9eff5..4ffba9cfb5 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/manifest_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/manifest_op.cc
@@ -33,7 +33,6 @@ namespace dataset {
 ManifestOp::Builder::Builder() : builder_sampler_(nullptr), builder_decode_(false) {
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
   builder_num_workers_ = cfg->num_parallel_workers();
-  builder_rows_per_buffer_ = cfg->rows_per_buffer();
   builder_op_connector_size_ = cfg->op_connector_size();
 }
 
@@ -49,9 +48,9 @@ Status ManifestOp::Builder::Build(std::shared_ptr<ManifestOp> *ptr) {
     builder_schema_->AddColumn(ColDescriptor("image", DataType(DataType::DE_UINT8), TensorImpl::kFlexible, 1)));
   RETURN_IF_NOT_OK(
     builder_schema_->AddColumn(ColDescriptor("label", DataType(DataType::DE_UINT32), TensorImpl::kFlexible, 1)));
-  *ptr = std::make_shared<ManifestOp>(builder_num_workers_, builder_rows_per_buffer_, builder_file_,
-                                      builder_op_connector_size_, builder_decode_, builder_labels_to_read_,
-                                      std::move(builder_schema_), std::move(builder_sampler_), builder_usage_);
+  *ptr = std::make_shared<ManifestOp>(builder_num_workers_, builder_file_, builder_op_connector_size_, builder_decode_,
+                                      builder_labels_to_read_, std::move(builder_schema_), std::move(builder_sampler_),
+                                      builder_usage_);
   return Status::OK();
 }
 
@@ -64,10 +63,10 @@ Status ManifestOp::Builder::SanityCheck() {
   return err_msg.empty() ? Status::OK() : Status(StatusCode::kMDUnexpectedError, __LINE__, __FILE__, err_msg);
 }
 
-ManifestOp::ManifestOp(int32_t num_works, int32_t rows_per_buffer, std::string file, int32_t queue_size, bool decode,
+ManifestOp::ManifestOp(int32_t num_works, std::string file, int32_t queue_size, bool decode,
                        const std::map<std::string, int32_t> &class_index, std::unique_ptr<DataSchema> data_schema,
                        std::shared_ptr<SamplerRT> sampler, std::string usage)
-    : MappableLeafOp(num_works, queue_size, std::move(sampler), rows_per_buffer),
+    : MappableLeafOp(num_works, queue_size, std::move(sampler)),
       io_block_pushed_(0),
       sampler_ind_(0),
       data_schema_(std::move(data_schema)),
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/manifest_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/manifest_op.h
index 2ccb0fda8f..76562b2d0b 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/manifest_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/manifest_op.h
@@ -46,14 +46,6 @@ class ManifestOp : public MappableLeafOp {
     // Destructor
     ~Builder() = default;
 
-    // Setter method
-    // @param int32_t rows_per_buffer
-    // @return Builder setter method returns reference to the builder.
-    Builder &SetRowsPerBuffer(int32_t rows_per_buffer) {
-      builder_rows_per_buffer_ = rows_per_buffer;
-      return *this;
-    }
-
     // Setter method
     // @param int32_t size
     // @return Builder setter method returns reference to the builder.
@@ -134,11 +126,10 @@ class ManifestOp : public MappableLeafOp {
 
   // Constructor
   // @param int32_t num_works - Num of workers reading images in parallel
-  // @param int32_t - rows_per_buffer Number of images (rows) in each buffer
   // @param std::string - file list of Manifest
   // @param int32_t queue_size - connector queue size
   // @param td::unique_ptr<Sampler> sampler - sampler tells ImageFolderOp what to read
-  ManifestOp(int32_t num_works, int32_t rows_per_buffer, std::string file, int32_t queue_size, bool decode,
+  ManifestOp(int32_t num_works, std::string file, int32_t queue_size, bool decode,
              const std::map<std::string, int32_t> &class_index, std::unique_ptr<DataSchema> data_schema,
              std::shared_ptr<SamplerRT> sampler, std::string usage);
   // Destructor.
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mappable_leaf_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mappable_leaf_op.cc
index 5f6a131d79..b2d63cbc41 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mappable_leaf_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mappable_leaf_op.cc
@@ -24,9 +24,8 @@
 namespace mindspore {
 namespace dataset {
 
-MappableLeafOp::MappableLeafOp(int32_t num_wkrs, int32_t queue_size, std::shared_ptr<SamplerRT> sampler,
-                               int32_t rows_per_buffer)
-    : ParallelOp(num_wkrs, queue_size, std::move(sampler)), rows_per_buffer_(rows_per_buffer) {}
+MappableLeafOp::MappableLeafOp(int32_t num_wkrs, int32_t queue_size, std::shared_ptr<SamplerRT> sampler)
+    : ParallelOp(num_wkrs, queue_size, std::move(sampler)) {}
 
 // Main logic, Register Queue with TaskGroup, launch all threads and do the functor's work
 Status MappableLeafOp::operator()() {
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mappable_leaf_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mappable_leaf_op.h
index 9ff9a61c10..fd1356361b 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mappable_leaf_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mappable_leaf_op.h
@@ -47,16 +47,13 @@ namespace dataset {
 template <typename T>
 class Queue;
 
-using ImageLabelPair = std::shared_ptr<std::pair<std::string, int32_t>>;
-using FolderImagesPair = std::shared_ptr<std::pair<std::string, std::queue<ImageLabelPair>>>;
-
 class MappableLeafOp : public ParallelOp, public RandomAccessOp {
  public:
   /// Constructor
   /// \param int32_t num_wkrs - Num of workers reading images in parallel
   /// \param int32_t queue_size - connector queue size
   /// \param td::unique_ptr<Sampler> sampler - sampler tells the source  what to read
-  MappableLeafOp(int32_t num_wkrs, int32_t queue_size, std::shared_ptr<SamplerRT> sampler, int32_t rows_per_buffer);
+  MappableLeafOp(int32_t num_wkrs, int32_t queue_size, std::shared_ptr<SamplerRT> sampler);
 
   /// Destructor.
   ~MappableLeafOp() = default;
@@ -94,10 +91,6 @@ class MappableLeafOp : public ParallelOp, public RandomAccessOp {
   /// Reset function to be called after every epoch to reset the source op after
   /// \return Status The status code returned
   Status Reset() override;
-
-  int32_t rows_per_buffer_;
-  int64_t row_cnt_;
-  int64_t buf_cnt_;
 };
 }  // namespace dataset
 }  // namespace mindspore
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mindrecord_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mindrecord_op.cc
index 00140c38cc..246c8714ee 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mindrecord_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mindrecord_op.cc
@@ -50,7 +50,6 @@ MindRecordOp::Builder::Builder() : build_dataset_file_({}) {
 
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
   build_num_mind_record_workers_ = kDefaultMindRecordWorkers;
-  build_rows_per_buffer_ = cfg->rows_per_buffer();
   build_op_connector_queue_size_ = cfg->op_connector_size();
   builder_num_workers_ = 0;
   build_load_dataset_ = false;
@@ -114,7 +113,7 @@ MindRecordOp::MindRecordOp(int32_t num_mind_record_workers, std::vector<std::str
                            int32_t op_connector_queue_size, const std::vector<std::string> &columns_to_load,
                            const std::vector<std::shared_ptr<ShardOperator>> &operators, int64_t num_padded,
                            const mindrecord::json &sample_json, const std::map<std::string, std::string> &sample_bytes)
-    : MappableLeafOp(num_mind_record_workers, op_connector_queue_size, std::make_shared<SequentialSamplerRT>(0, 0), 1),
+    : MappableLeafOp(num_mind_record_workers, op_connector_queue_size, std::make_shared<SequentialSamplerRT>(0, 0)),
       dataset_file_(dataset_file),
       load_dataset_(load_dataset),
       columns_to_load_(columns_to_load),
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mnist_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mnist_op.cc
index c7498deb06..0ba04252bb 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mnist_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mnist_op.cc
@@ -35,7 +35,6 @@ const int32_t kMnistImageCols = 28;
 MnistOp::Builder::Builder() : builder_sampler_(nullptr), builder_usage_("") {
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
   builder_num_workers_ = cfg->num_parallel_workers();
-  builder_rows_per_buffer_ = cfg->rows_per_buffer();
   builder_op_connector_size_ = cfg->op_connector_size();
 }
 
@@ -52,8 +51,8 @@ Status MnistOp::Builder::Build(std::shared_ptr<MnistOp> *ptr) {
   TensorShape scalar = TensorShape::CreateScalar();
   RETURN_IF_NOT_OK(builder_schema_->AddColumn(
     ColDescriptor("label", DataType(DataType::DE_UINT32), TensorImpl::kFlexible, 0, &scalar)));
-  *ptr = std::make_shared<MnistOp>(builder_usage_, builder_num_workers_, builder_rows_per_buffer_, builder_dir_,
-                                   builder_op_connector_size_, std::move(builder_schema_), std::move(builder_sampler_));
+  *ptr = std::make_shared<MnistOp>(builder_usage_, builder_num_workers_, builder_dir_, builder_op_connector_size_,
+                                   std::move(builder_schema_), std::move(builder_sampler_));
   return Status::OK();
 }
 
@@ -73,9 +72,9 @@ Status MnistOp::Builder::SanityCheck() {
   return err_msg.empty() ? Status::OK() : Status(StatusCode::kMDUnexpectedError, __LINE__, __FILE__, err_msg);
 }
 
-MnistOp::MnistOp(const std::string &usage, int32_t num_workers, int32_t rows_per_buffer, std::string folder_path,
-                 int32_t queue_size, std::unique_ptr<DataSchema> data_schema, std::shared_ptr<SamplerRT> sampler)
-    : MappableLeafOp(num_workers, queue_size, std::move(sampler), rows_per_buffer),
+MnistOp::MnistOp(const std::string &usage, int32_t num_workers, std::string folder_path, int32_t queue_size,
+                 std::unique_ptr<DataSchema> data_schema, std::shared_ptr<SamplerRT> sampler)
+    : MappableLeafOp(num_workers, queue_size, std::move(sampler)),
       usage_(usage),
       folder_path_(folder_path),
       image_path_({}),
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mnist_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mnist_op.h
index c95b305e66..03b200c34d 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mnist_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/mnist_op.h
@@ -52,14 +52,6 @@ class MnistOp : public MappableLeafOp {
     // Destructor.
     ~Builder() = default;
 
-    // Setter method
-    // @param int32_t rows_per_buffer
-    // @return Builder setter method returns reference to the builder.
-    Builder &SetRowsPerBuffer(int32_t rows_per_buffer) {
-      builder_rows_per_buffer_ = rows_per_buffer;
-      return *this;
-    }
-
     // Setter method
     // @param int32_t op_connector_size
     // @return Builder setter method returns reference to the builder.
@@ -121,13 +113,12 @@ class MnistOp : public MappableLeafOp {
   // Constructor
   // @param const std::string &usage - Usage of this dataset, can be 'train', 'test' or 'all'
   // @param int32_t num_workers - number of workers reading images in parallel
-  // @param int32_t rows_per_buffer - number of images (rows) in each buffer
   // @param std::string folder_path - dir directory of mnist
   // @param int32_t queue_size - connector queue size
   // @param std::unique_ptr<DataSchema> data_schema - the schema of the mnist dataset
   // @param td::unique_ptr<Sampler> sampler - sampler tells MnistOp what to read
-  MnistOp(const std::string &usage, int32_t num_workers, int32_t rows_per_buffer, std::string folder_path,
-          int32_t queue_size, std::unique_ptr<DataSchema> data_schema, std::shared_ptr<SamplerRT> sampler);
+  MnistOp(const std::string &usage, int32_t num_workers, std::string folder_path, int32_t queue_size,
+          std::unique_ptr<DataSchema> data_schema, std::shared_ptr<SamplerRT> sampler);
 
   // Destructor.
   ~MnistOp() = default;
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/nonmappable_leaf_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/nonmappable_leaf_op.cc
index 226f0ddba6..395c458b2c 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/nonmappable_leaf_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/nonmappable_leaf_op.cc
@@ -36,13 +36,12 @@
 namespace mindspore {
 namespace dataset {
 
-NonMappableLeafOp::NonMappableLeafOp(int32_t num_workers, int32_t worker_connector_size, int64_t rows_per_buffer,
-                                     int64_t total_num_rows, int32_t op_connector_size, bool shuffle_files,
-                                     int32_t num_devices, int32_t device_id)
+NonMappableLeafOp::NonMappableLeafOp(int32_t num_workers, int32_t worker_connector_size, int64_t total_num_rows,
+                                     int32_t op_connector_size, bool shuffle_files, int32_t num_devices,
+                                     int32_t device_id)
     : ParallelOp(num_workers, op_connector_size),
       device_id_(device_id),
       num_devices_(num_devices),
-      rows_per_buffer_(rows_per_buffer),
       filename_index_(std::make_unique<StringIndex>()),
       load_io_block_queue_(true),
       load_jagged_connector_(true),
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/nonmappable_leaf_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/nonmappable_leaf_op.h
index 3b8645adfa..ac552aa8c8 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/nonmappable_leaf_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/nonmappable_leaf_op.h
@@ -49,14 +49,13 @@ class NonMappableLeafOp : public ParallelOp {
   // @note The builder class should be used to call this constructor.
   // @param num_workers - number of worker threads reading data from tf_file files.
   // @param worker_connector_size - size of each internal queue.
-  // @param rows_per_buffer - number of rows that a full buffer will contain.
   // @param total_num_rows - Number of rows to read
   // @param dataset_files_list - list of filepaths for the dataset files.
   // @param op_connector_size - size of each queue in the connector that the child operator pulls from.
   // @param columns_to_load - the names of the columns to load data from.
   // @param shuffle_files - whether or not to shuffle the files before reading data.
   // @param equal_rows_per_shard - whether or not to get equal rows for each process.
-  NonMappableLeafOp(int32_t num_workers, int32_t worker_connector_size, int64_t rows_per_buffer, int64_t total_num_rows,
+  NonMappableLeafOp(int32_t num_workers, int32_t worker_connector_size, int64_t total_num_rows,
                     int32_t op_connector_size, bool shuffle_files, int32_t num_devices, int32_t device_id);
 
   // Default destructor
@@ -77,9 +76,6 @@ class NonMappableLeafOp : public ParallelOp {
   // @return Status - the error code returned.
   Status Reset() override;
 
-  // Getter method
-  int64_t rows_per_buffer() const { return rows_per_buffer_; }
-
   // Op name getter
   // @return Name of the current Op
   std::string Name() const override { return "NonMappableLeafOp"; }
@@ -157,7 +153,6 @@ class NonMappableLeafOp : public ParallelOp {
   bool finished_reading_dataset_;
   int64_t total_rows_;
 
-  int64_t rows_per_buffer_;
   WaitPost io_block_queue_wait_post_;
   bool load_io_block_queue_;
   std::mutex load_io_block_queue_mutex_;
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/random_data_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/random_data_op.cc
index 0158905bfa..4c7ec3520b 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/random_data_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/random_data_op.cc
@@ -37,7 +37,6 @@ RandomDataOp::Builder::Builder()
   // Some arguments to the RandomDataOp have a default argument that is taken from the config.
   // The user may override these defaults by using the builder set methods.
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
-  builder_rows_per_buffer_ = cfg->rows_per_buffer();
   builder_num_workers_ = cfg->num_parallel_workers();
   builder_op_connector_size_ = cfg->op_connector_size();
 }
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/random_data_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/random_data_op.h
index 005e940fb4..6fd597599e 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/random_data_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/random_data_op.h
@@ -97,16 +97,6 @@ class RandomDataOp : public ParallelOp {
       return *this;
     }
 
-    /**
-     * Builder set method
-     * @param rows_per_buffer - The number of rows in each DataBuffer
-     * @return Builder - The modified builder by reference
-     */
-    Builder &SetRowsPerBuffer(int64_t rows_per_buffer) {
-      builder_rows_per_buffer_ = rows_per_buffer;
-      return *this;
-    }
-
     /**
      * Builder set method
      * @param total_rows - The total number of rows in the dataset
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/text_file_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/text_file_op.cc
index 5aa7e6210d..904b6891dc 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/text_file_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/text_file_op.cc
@@ -36,7 +36,6 @@ TextFileOp::Builder::Builder()
   std::shared_ptr<ConfigManager> config_manager = GlobalContext::config_manager();
   builder_num_workers_ = config_manager->num_parallel_workers();
   builder_op_connector_size_ = config_manager->op_connector_size();
-  builder_rows_per_buffer_ = config_manager->rows_per_buffer();
   builder_worker_connector_size_ = config_manager->worker_connector_size();
 }
 
@@ -65,21 +64,21 @@ Status TextFileOp::Builder::Build(std::shared_ptr<TextFileOp> *op) {
   RETURN_IF_NOT_OK(
     builder_schema_->AddColumn(ColDescriptor("text", DataType(DataType::DE_UINT8), TensorImpl::kFlexible, 1)));
 
-  std::shared_ptr<TextFileOp> text_file_op = std::make_shared<TextFileOp>(
-    builder_num_workers_, builder_rows_per_buffer_, builder_total_rows_, builder_worker_connector_size_,
-    std::move(builder_schema_), builder_text_files_list_, builder_op_connector_size_, builder_shuffle_files_,
-    builder_num_devices_, builder_device_id_);
+  std::shared_ptr<TextFileOp> text_file_op =
+    std::make_shared<TextFileOp>(builder_num_workers_, builder_total_rows_, builder_worker_connector_size_,
+                                 std::move(builder_schema_), builder_text_files_list_, builder_op_connector_size_,
+                                 builder_shuffle_files_, builder_num_devices_, builder_device_id_);
   RETURN_IF_NOT_OK(text_file_op->Init());
   *op = std::move(text_file_op);
 
   return Status::OK();
 }
 
-TextFileOp::TextFileOp(int32_t num_workers, int64_t rows_per_buffer, int64_t total_rows, int32_t worker_connector_size,
+TextFileOp::TextFileOp(int32_t num_workers, int64_t total_rows, int32_t worker_connector_size,
                        std::unique_ptr<DataSchema> schema, std::vector<std::string> text_files_list,
                        int32_t op_connector_size, bool shuffle_files, int32_t num_devices, int32_t device_id)
-    : NonMappableLeafOp(num_workers, worker_connector_size, rows_per_buffer, total_rows, op_connector_size,
-                        shuffle_files, num_devices, device_id),
+    : NonMappableLeafOp(num_workers, worker_connector_size, total_rows, op_connector_size, shuffle_files, num_devices,
+                        device_id),
       text_files_list_(std::move(text_files_list)),
       data_schema_(std::move(schema)) {}
 
@@ -94,9 +93,8 @@ void TextFileOp::Print(std::ostream &out, bool show_all) const {
     // Call the super class for displaying any common detailed info
     ParallelOp::Print(out, show_all);
     // Then show any custom derived-internal stuff
-    out << "\nRows per buffer: " << rows_per_buffer_ << "\nRow count: " << total_rows_ << "\nDevice id: " << device_id_
-        << "\nNumber of devices: " << num_devices_ << "\nShuffle files: " << ((shuffle_files_) ? "yes" : "no")
-        << "\nText files list:\n";
+    out << "\nRow count: " << total_rows_ << "\nDevice id: " << device_id_ << "\nNumber of devices: " << num_devices_
+        << "\nShuffle files: " << ((shuffle_files_) ? "yes" : "no") << "\nText files list:\n";
     for (int i = 0; i < text_files_list_.size(); ++i) {
       out << " " << text_files_list_[i];
     }
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/text_file_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/text_file_op.h
index e6f6092c67..99e2670e85 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/text_file_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/text_file_op.h
@@ -129,7 +129,6 @@ class TextFileOp : public NonMappableLeafOp {
   // Constructor of TextFileOp
   // @note The builder class should be used to call this constructor.
   // @param num_workers - number of worker threads reading data from tf_file files.
-  // @param rows_per_buffer - number of rows that a full buffer will contain.
   // @param total_num_rows - number of rows to read
   // @param dataset_files_list - list of filepaths for the dataset files.
   // @param data_schema - the data schema object.
@@ -137,9 +136,9 @@ class TextFileOp : public NonMappableLeafOp {
   // @param columns_to_load - the names of the columns to load data from.
   // @param shuffle_files - whether or not to shuffle the files before reading data.
   // @param equal_rows_per_shard - whether or not to get equal rows for each process.
-  TextFileOp(int32_t num_workers, int64_t rows_per_buffer, int64_t total_rows, int32_t worker_connector_size,
-             std::unique_ptr<DataSchema>, std::vector<std::string> text_files_list, int32_t op_connector_size,
-             bool shuffle_files, int32_t num_devices, int32_t device_id);
+  TextFileOp(int32_t num_workers, int64_t total_rows, int32_t worker_connector_size, std::unique_ptr<DataSchema>,
+             std::vector<std::string> text_files_list, int32_t op_connector_size, bool shuffle_files,
+             int32_t num_devices, int32_t device_id);
 
   // Default destructor
   ~TextFileOp() = default;
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/tf_reader_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/tf_reader_op.cc
index 04ccd429a1..dc779ca382 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/tf_reader_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/tf_reader_op.cc
@@ -47,7 +47,6 @@ TFReaderOp::Builder::Builder()
   builder_num_workers_ = config_manager->num_parallel_workers();
   builder_worker_connector_size_ = config_manager->worker_connector_size();
   builder_op_connector_size_ = config_manager->op_connector_size();
-  builder_rows_per_buffer_ = config_manager->rows_per_buffer();
   builder_shuffle_files_ = false;
   builder_data_schema_ = std::make_unique<DataSchema>();
 }
@@ -114,22 +113,21 @@ Status TFReaderOp::Builder::Build(std::shared_ptr<TFReaderOp> *out_tf_reader_op)
   }
 
   std::shared_ptr<TFReaderOp> new_tf_reader_op = std::make_shared<TFReaderOp>(
-    builder_num_workers_, builder_worker_connector_size_, builder_rows_per_buffer_, builder_total_rows_,
-    builder_dataset_files_list_, std::move(builder_data_schema_), builder_op_connector_size_, builder_columns_to_load_,
-    builder_shuffle_files_, builder_num_devices_, builder_device_id_, builder_equal_rows_per_shard_);
+    builder_num_workers_, builder_worker_connector_size_, builder_total_rows_, builder_dataset_files_list_,
+    std::move(builder_data_schema_), builder_op_connector_size_, builder_columns_to_load_, builder_shuffle_files_,
+    builder_num_devices_, builder_device_id_, builder_equal_rows_per_shard_);
 
   RETURN_IF_NOT_OK(new_tf_reader_op->Init());
   *out_tf_reader_op = std::move(new_tf_reader_op);
   return Status::OK();
 }
 
-TFReaderOp::TFReaderOp(int32_t num_workers, int32_t worker_connector_size, int64_t rows_per_buffer,
-                       int64_t total_num_rows, std::vector<std::string> dataset_files_list,
-                       std::unique_ptr<DataSchema> data_schema, int32_t op_connector_size,
-                       std::vector<std::string> columns_to_load, bool shuffle_files, int32_t num_devices,
-                       int32_t device_id, bool equal_rows_per_shard)
-    : NonMappableLeafOp(num_workers, worker_connector_size, rows_per_buffer, total_num_rows, op_connector_size,
-                        shuffle_files, num_devices, device_id),
+TFReaderOp::TFReaderOp(int32_t num_workers, int32_t worker_connector_size, int64_t total_num_rows,
+                       std::vector<std::string> dataset_files_list, std::unique_ptr<DataSchema> data_schema,
+                       int32_t op_connector_size, std::vector<std::string> columns_to_load, bool shuffle_files,
+                       int32_t num_devices, int32_t device_id, bool equal_rows_per_shard)
+    : NonMappableLeafOp(num_workers, worker_connector_size, total_num_rows, op_connector_size, shuffle_files,
+                        num_devices, device_id),
       dataset_files_list_(std::move(dataset_files_list)),
       columns_to_load_(std::move(columns_to_load)),
       data_schema_(std::move(data_schema)),
@@ -146,8 +144,8 @@ void TFReaderOp::Print(std::ostream &out, bool show_all) const {
     // Call the super class for displaying any common detailed info
     ParallelOp::Print(out, show_all);
     // Then show any custom derived-internal stuff
-    out << "\nRows per buffer: " << rows_per_buffer_ << "\nTotal rows: " << total_rows_ << "\nDevice id: " << device_id_
-        << "\nNumber of devices: " << num_devices_ << "\nShuffle files: " << ((shuffle_files_) ? "yes" : "no")
+    out << "\nTotal rows: " << total_rows_ << "\nDevice id: " << device_id_ << "\nNumber of devices: " << num_devices_
+        << "\nShuffle files: " << ((shuffle_files_) ? "yes" : "no")
         << "\nDataset files list: Size: " << dataset_files_list_.size() << "\n";
     for (int i = 0; i < dataset_files_list_.size(); ++i) {
       out << " " << dataset_files_list_[i];
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/tf_reader_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/tf_reader_op.h
index 56cd516cf6..02e02ba6aa 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/tf_reader_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/tf_reader_op.h
@@ -173,7 +173,6 @@ class TFReaderOp : public NonMappableLeafOp {
   // @note The builder class should be used to call this constructor.
   // @param num_workers - number of worker threads reading data from tf_file files.
   // @param worker_connector_size - size of each internal queue.
-  // @param rows_per_buffer - number of rows that a full buffer will contain.
   // @param total_num_rows - Number of rows to read
   // @param dataset_files_list - list of filepaths for the dataset files.
   // @param data_schema - the data schema object.
@@ -181,7 +180,7 @@ class TFReaderOp : public NonMappableLeafOp {
   // @param columns_to_load - the names of the columns to load data from.
   // @param shuffle_files - whether or not to shuffle the files before reading data.
   // @param equal_rows_per_shard - whether or not to get equal rows for each process.
-  TFReaderOp(int32_t num_workers, int32_t worker_connector_size, int64_t rows_per_buffer, int64_t total_num_rows,
+  TFReaderOp(int32_t num_workers, int32_t worker_connector_size, int64_t total_num_rows,
              std::vector<std::string> dataset_files_list, std::unique_ptr<DataSchema> data_schema,
              int32_t op_connector_size, std::vector<std::string> columns_to_load, bool shuffle_files,
              int32_t num_devices, int32_t device_id, bool equal_rows_per_shard);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/voc_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/voc_op.cc
index 56c6ee2833..cbc005a77a 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/voc_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/voc_op.cc
@@ -47,7 +47,6 @@ const char kImageSetsExtension[] = ".txt";
 VOCOp::Builder::Builder() : builder_decode_(false), builder_sampler_(nullptr) {
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
   builder_num_workers_ = cfg->num_parallel_workers();
-  builder_rows_per_buffer_ = cfg->rows_per_buffer();
   builder_op_connector_size_ = cfg->op_connector_size();
   builder_task_type_ = TaskType::Segmentation;
 }
@@ -78,8 +77,8 @@ Status VOCOp::Builder::Build(std::shared_ptr<VOCOp> *ptr) {
       ColDescriptor(std::string(kColumnTruncate), DataType(DataType::DE_UINT32), TensorImpl::kFlexible, 1)));
   }
   *ptr = std::make_shared<VOCOp>(builder_task_type_, builder_usage_, builder_dir_, builder_labels_to_read_,
-                                 builder_num_workers_, builder_rows_per_buffer_, builder_op_connector_size_,
-                                 builder_decode_, std::move(builder_schema_), std::move(builder_sampler_));
+                                 builder_num_workers_, builder_op_connector_size_, builder_decode_,
+                                 std::move(builder_schema_), std::move(builder_sampler_));
   return Status::OK();
 }
 
@@ -96,10 +95,9 @@ Status VOCOp::Builder::SanityCheck() {
 }
 
 VOCOp::VOCOp(const TaskType &task_type, const std::string &task_mode, const std::string &folder_path,
-             const std::map<std::string, int32_t> &class_index, int32_t num_workers, int32_t rows_per_buffer,
-             int32_t queue_size, bool decode, std::unique_ptr<DataSchema> data_schema,
-             std::shared_ptr<SamplerRT> sampler)
-    : MappableLeafOp(num_workers, queue_size, std::move(sampler), rows_per_buffer),
+             const std::map<std::string, int32_t> &class_index, int32_t num_workers, int32_t queue_size, bool decode,
+             std::unique_ptr<DataSchema> data_schema, std::shared_ptr<SamplerRT> sampler)
+    : MappableLeafOp(num_workers, queue_size, std::move(sampler)),
       decode_(decode),
       task_type_(task_type),
       usage_(task_mode),
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/voc_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/voc_op.h
index 7ba853449e..34b34c0a8d 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/voc_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/source/voc_op.h
@@ -112,14 +112,6 @@ class VOCOp : public MappableLeafOp {
       return *this;
     }
 
-    // Setter method.
-    // @param int32_t rows_per_buffer
-    // @return Builder setter method returns reference to the builder.
-    Builder &SetRowsPerBuffer(int32_t rows_per_buffer) {
-      builder_rows_per_buffer_ = rows_per_buffer;
-      return *this;
-    }
-
     // Setter method.
     // @param std::shared_ptr<Sampler> sampler
     // @return Builder setter method returns reference to the builder.
@@ -164,14 +156,13 @@ class VOCOp : public MappableLeafOp {
   // @param std::string folder_path - dir directory of VOC
   // @param std::map<std::string, int32_t> class_index - input class-to-index of annotation
   // @param int32_t num_workers - number of workers reading images in parallel
-  // @param int32_t rows_per_buffer - number of images (rows) in each buffer
   // @param int32_t queue_size - connector queue size
   // @param bool decode - whether to decode images
   // @param std::unique_ptr<DataSchema> data_schema - the schema of the VOC dataset
   // @param std::shared_ptr<Sampler> sampler - sampler tells VOCOp what to read
   VOCOp(const TaskType &task_type, const std::string &task_mode, const std::string &folder_path,
-        const std::map<std::string, int32_t> &class_index, int32_t num_workers, int32_t rows_per_buffer,
-        int32_t queue_size, bool decode, std::unique_ptr<DataSchema> data_schema, std::shared_ptr<SamplerRT> sampler);
+        const std::map<std::string, int32_t> &class_index, int32_t num_workers, int32_t queue_size, bool decode,
+        std::unique_ptr<DataSchema> data_schema, std::shared_ptr<SamplerRT> sampler);
 
   // Destructor
   ~VOCOp() = default;
@@ -255,11 +246,9 @@ class VOCOp : public MappableLeafOp {
 
   bool decode_;
   int64_t row_cnt_;
-  int64_t buf_cnt_;
   std::string folder_path_;
   TaskType task_type_;
   std::string usage_;
-  int32_t rows_per_buffer_;
   std::unique_ptr<DataSchema> data_schema_;
 
   std::vector<std::string> image_ids_;
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/zip_op.cc b/mindspore/ccsrc/minddata/dataset/engine/datasetops/zip_op.cc
index d329cdd102..b76b953640 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/zip_op.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/zip_op.cc
@@ -33,7 +33,6 @@ ZipOp::Builder::Builder() {
   // using the various builder set methods.
 
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
-  builder_rows_per_buffer_ = cfg->rows_per_buffer();
   builder_op_connector_size_ = cfg->op_connector_size();
 }
 
@@ -41,18 +40,13 @@ Status ZipOp::Builder::SanityCheck() const { return Status::OK(); }
 
 Status ZipOp::Builder::Build(std::shared_ptr<ZipOp> *ptr) {
   RETURN_IF_NOT_OK(SanityCheck());
-  *ptr = std::make_shared<ZipOp>(builder_rows_per_buffer_, builder_op_connector_size_);
+  *ptr = std::make_shared<ZipOp>(builder_op_connector_size_);
   return Status::OK();
 }
 
 // Construct ZipOp here, local variables initialized in operator due to tree construction restrictions
-ZipOp::ZipOp(int32_t rows_per_buffer, int32_t op_connector_size)
-    : PipelineOp(op_connector_size),
-      children_num_(0),
-      rows_per_buffer_(rows_per_buffer),
-      buffer_id_(0),
-      draining_(false),
-      eof_(false) {}
+ZipOp::ZipOp(int32_t op_connector_size)
+    : PipelineOp(op_connector_size), children_num_(0), draining_(false), eof_(false) {}
 
 // destructor
 ZipOp::~ZipOp() {}
diff --git a/mindspore/ccsrc/minddata/dataset/engine/datasetops/zip_op.h b/mindspore/ccsrc/minddata/dataset/engine/datasetops/zip_op.h
index 2591e5cf47..f14adc70fd 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/datasetops/zip_op.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/datasetops/zip_op.h
@@ -76,9 +76,8 @@ class ZipOp : public PipelineOp {
   };
 
   // Constructor for ZipOp
-  // @param rows_per_buffer - number of rows in output buffer
   // @param op_connector_size - connector size
-  ZipOp(int32_t rows_per_buffer, int32_t op_connector_size);
+  explicit ZipOp(int32_t op_connector_size);
 
   // Destructor
   ~ZipOp();
@@ -136,8 +135,6 @@ class ZipOp : public PipelineOp {
   Status ComputeColMap() override;
 
   int32_t children_num_;
-  int32_t rows_per_buffer_;
-  int32_t buffer_id_;
   bool draining_;
   bool eof_;
   std::vector<std::unique_ptr<ChildIterator>> child_iterators_;
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/dataset_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/dataset_node.cc
index 2a1fb556ac..36aae6e9d2 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/dataset_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/dataset_node.cc
@@ -58,13 +58,13 @@ Status ComputeShuffleSize(int64_t num_files, int64_t num_devices, int64_t num_ro
 
 // Helper function to inject a shuffle operator over top of current operator being built
 Status AddShuffleOp(int64_t num_files, int64_t num_devices, int64_t num_rows, int64_t total_rows,
-                    int32_t connector_que_size, int32_t rows_per_buffer, std::shared_ptr<DatasetOp> *shuffle_op) {
+                    int32_t connector_que_size, std::shared_ptr<DatasetOp> *shuffle_op) {
   std::shared_ptr<ShuffleOp> new_shuffle_op = nullptr;
   int64_t shuffle_size = 0;
   RETURN_IF_NOT_OK(ComputeShuffleSize(num_files, num_devices, num_rows, total_rows, &shuffle_size));
   MS_LOG(INFO) << "Dataset::AddShuffleOp - num_rows: " << num_rows << ", shuffle_size: " << shuffle_size;
   // Add the shuffle op
-  *shuffle_op = std::make_shared<ShuffleOp>(shuffle_size, GetSeed(), connector_que_size, true, rows_per_buffer);
+  *shuffle_op = std::make_shared<ShuffleOp>(shuffle_size, GetSeed(), connector_que_size, true);
   return Status::OK();
 }
 
@@ -231,7 +231,6 @@ DatasetNode::DatasetNode()
   // Fetch some default value from config manager
   std::shared_ptr<ConfigManager> cfg = GlobalContext::config_manager();
   num_workers_ = cfg->num_parallel_workers();
-  rows_per_buffer_ = cfg->rows_per_buffer();
   connector_que_size_ = cfg->op_connector_size();
   worker_connector_size_ = cfg->worker_connector_size();
 }
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/dataset_node.h b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/dataset_node.h
index 0695335288..43c81afa6c 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/dataset_node.h
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/dataset_node.h
@@ -92,7 +92,7 @@ constexpr char kTFRecordNode[] = "TFRecordDataset";
 constexpr char kVOCNode[] = "VOCDataset";
 
 Status AddShuffleOp(int64_t num_files, int64_t num_devices, int64_t num_rows, int64_t total_rows,
-                    int32_t connector_que_size, int32_t rows_per_buffer, std::shared_ptr<DatasetOp> *shuffle_op);
+                    int32_t connector_que_size, std::shared_ptr<DatasetOp> *shuffle_op);
 
 // Helper function to validate dataset files parameter
 Status ValidateDatasetFilesParam(const std::string &dataset_name, const std::vector<std::string> &dataset_files);
@@ -323,7 +323,6 @@ class DatasetNode : public std::enable_shared_from_this<DatasetNode> {
   std::shared_ptr<DatasetCache> cache_;
   int64_t dataset_size_;
   int32_t num_workers_;
-  int32_t rows_per_buffer_;
   int32_t connector_que_size_;
   int32_t worker_connector_size_;
   int32_t total_repeats_;  // Number of times required to run this operator
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/shuffle_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/shuffle_node.cc
index 85267c0785..dc5c3f9595 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/shuffle_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/shuffle_node.cc
@@ -44,8 +44,7 @@ void ShuffleNode::Print(std::ostream &out) const {
 
 // Function to build the ShuffleOp
 Status ShuffleNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_ops) {
-  auto op = std::make_shared<ShuffleOp>(shuffle_size_, shuffle_seed_, connector_que_size_, reset_every_epoch_,
-                                        rows_per_buffer_);
+  auto op = std::make_shared<ShuffleOp>(shuffle_size_, shuffle_seed_, connector_que_size_, reset_every_epoch_);
   op->set_total_repeats(GetTotalRepeats());
   op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
   node_ops->push_back(op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/album_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/album_node.cc
index 8fdd53a93d..017847d1ae 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/album_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/album_node.cc
@@ -74,8 +74,8 @@ Status AlbumNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_ops)
   std::shared_ptr<SamplerRT> sampler_rt = nullptr;
   RETURN_IF_NOT_OK(sampler_->SamplerBuild(&sampler_rt));
 
-  auto album_op = std::make_shared<AlbumOp>(num_workers_, rows_per_buffer_, dataset_dir_, connector_que_size_, decode_,
-                                            extensions, std::move(schema), std::move(sampler_rt));
+  auto album_op = std::make_shared<AlbumOp>(num_workers_, dataset_dir_, connector_que_size_, decode_, extensions,
+                                            std::move(schema), std::move(sampler_rt));
   album_op->set_total_repeats(GetTotalRepeats());
   album_op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
   node_ops->push_back(album_op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/celeba_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/celeba_node.cc
index 8f451f41a5..cd46800d4d 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/celeba_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/celeba_node.cc
@@ -69,8 +69,8 @@ Status CelebANode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_ops
   std::shared_ptr<SamplerRT> sampler_rt = nullptr;
   RETURN_IF_NOT_OK(sampler_->SamplerBuild(&sampler_rt));
 
-  auto celeba_op = std::make_shared<CelebAOp>(num_workers_, rows_per_buffer_, dataset_dir_, connector_que_size_,
-                                              decode_, usage_, extensions_, std::move(schema), std::move(sampler_rt));
+  auto celeba_op = std::make_shared<CelebAOp>(num_workers_, dataset_dir_, connector_que_size_, decode_, usage_,
+                                              extensions_, std::move(schema), std::move(sampler_rt));
   celeba_op->set_total_repeats(GetTotalRepeats());
   celeba_op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
   node_ops->push_back(celeba_op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/cifar100_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/cifar100_node.cc
index 991be365ce..bd459d24e1 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/cifar100_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/cifar100_node.cc
@@ -66,9 +66,8 @@ Status Cifar100Node::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_o
   std::shared_ptr<SamplerRT> sampler_rt = nullptr;
   RETURN_IF_NOT_OK(sampler_->SamplerBuild(&sampler_rt));
 
-  auto cifar_op =
-    std::make_shared<CifarOp>(CifarOp::CifarType::kCifar100, usage_, num_workers_, rows_per_buffer_, dataset_dir_,
-                              connector_que_size_, std::move(schema), std::move(sampler_rt));
+  auto cifar_op = std::make_shared<CifarOp>(CifarOp::CifarType::kCifar100, usage_, num_workers_, dataset_dir_,
+                                            connector_que_size_, std::move(schema), std::move(sampler_rt));
   cifar_op->set_total_repeats(GetTotalRepeats());
   cifar_op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
   node_ops->push_back(cifar_op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/cifar10_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/cifar10_node.cc
index 3616a4a7b1..0ae429a7b2 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/cifar10_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/cifar10_node.cc
@@ -64,9 +64,8 @@ Status Cifar10Node::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_op
   std::shared_ptr<SamplerRT> sampler_rt = nullptr;
   RETURN_IF_NOT_OK(sampler_->SamplerBuild(&sampler_rt));
 
-  auto cifar_op =
-    std::make_shared<CifarOp>(CifarOp::CifarType::kCifar10, usage_, num_workers_, rows_per_buffer_, dataset_dir_,
-                              connector_que_size_, std::move(schema), std::move(sampler_rt));
+  auto cifar_op = std::make_shared<CifarOp>(CifarOp::CifarType::kCifar10, usage_, num_workers_, dataset_dir_,
+                                            connector_que_size_, std::move(schema), std::move(sampler_rt));
   cifar_op->set_total_repeats(GetTotalRepeats());
   cifar_op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
   node_ops->push_back(cifar_op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/clue_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/clue_node.cc
index a1b10b0f5c..e60e6f94b3 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/clue_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/clue_node.cc
@@ -177,8 +177,8 @@ Status CLUENode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_ops)
   std::sort(sorted_dataset_files.begin(), sorted_dataset_files.end());
 
   std::shared_ptr<ClueOp> clue_op =
-    std::make_shared<ClueOp>(num_workers_, rows_per_buffer_, num_samples_, worker_connector_size_, ck_map,
-                             sorted_dataset_files, connector_que_size_, shuffle_files, num_shards_, shard_id_);
+    std::make_shared<ClueOp>(num_workers_, num_samples_, worker_connector_size_, ck_map, sorted_dataset_files,
+                             connector_que_size_, shuffle_files, num_shards_, shard_id_);
 
   RETURN_IF_NOT_OK(clue_op->Init());
 
@@ -191,8 +191,8 @@ Status CLUENode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_ops)
     RETURN_IF_NOT_OK(ClueOp::CountAllFileRows(sorted_dataset_files, &num_rows));
 
     // Add the shuffle op after this op
-    RETURN_IF_NOT_OK(AddShuffleOp(sorted_dataset_files.size(), num_shards_, num_rows, 0, connector_que_size_,
-                                  rows_per_buffer_, &shuffle_op));
+    RETURN_IF_NOT_OK(
+      AddShuffleOp(sorted_dataset_files.size(), num_shards_, num_rows, 0, connector_que_size_, &shuffle_op));
     shuffle_op->set_total_repeats(GetTotalRepeats());
     shuffle_op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
     node_ops->push_back(shuffle_op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/coco_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/coco_node.cc
index 715c15e240..88ac78ffa4 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/coco_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/coco_node.cc
@@ -123,8 +123,8 @@ Status CocoNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_ops)
   RETURN_IF_NOT_OK(sampler_->SamplerBuild(&sampler_rt));
 
   std::shared_ptr<CocoOp> op =
-    std::make_shared<CocoOp>(task_type, dataset_dir_, annotation_file_, num_workers_, rows_per_buffer_,
-                             connector_que_size_, decode_, std::move(schema), std::move(sampler_rt));
+    std::make_shared<CocoOp>(task_type, dataset_dir_, annotation_file_, num_workers_, connector_que_size_, decode_,
+                             std::move(schema), std::move(sampler_rt));
   op->set_total_repeats(GetTotalRepeats());
   op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
   node_ops->push_back(op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/csv_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/csv_node.cc
index fd6471c455..99e999c04c 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/csv_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/csv_node.cc
@@ -114,8 +114,8 @@ Status CSVNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_ops) {
   }
 
   std::shared_ptr<CsvOp> csv_op = std::make_shared<CsvOp>(
-    sorted_dataset_files, field_delim_, column_default_list, column_names_, num_workers_, rows_per_buffer_,
-    num_samples_, worker_connector_size_, connector_que_size_, shuffle_files, num_shards_, shard_id_);
+    sorted_dataset_files, field_delim_, column_default_list, column_names_, num_workers_, num_samples_,
+    worker_connector_size_, connector_que_size_, shuffle_files, num_shards_, shard_id_);
 
   RETURN_IF_NOT_OK(csv_op->Init());
 
@@ -128,8 +128,8 @@ Status CSVNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_ops) {
     RETURN_IF_NOT_OK(CsvOp::CountAllFileRows(sorted_dataset_files, column_names_.empty(), &num_rows));
 
     // Add the shuffle op after this op
-    RETURN_IF_NOT_OK(AddShuffleOp(sorted_dataset_files.size(), num_shards_, num_rows, 0, connector_que_size_,
-                                  rows_per_buffer_, &shuffle_op));
+    RETURN_IF_NOT_OK(
+      AddShuffleOp(sorted_dataset_files.size(), num_shards_, num_rows, 0, connector_que_size_, &shuffle_op));
     shuffle_op->set_total_repeats(GetTotalRepeats());
     shuffle_op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
     node_ops->push_back(shuffle_op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/image_folder_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/image_folder_node.cc
index ad6d539a3d..258d3e9412 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/image_folder_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/image_folder_node.cc
@@ -72,9 +72,8 @@ Status ImageFolderNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const nod
   std::shared_ptr<SamplerRT> sampler_rt = nullptr;
   RETURN_IF_NOT_OK(sampler_->SamplerBuild(&sampler_rt));
 
-  auto op =
-    std::make_shared<ImageFolderOp>(num_workers_, rows_per_buffer_, dataset_dir_, connector_que_size_, recursive_,
-                                    decode_, exts_, class_indexing_, std::move(schema), std::move(sampler_rt));
+  auto op = std::make_shared<ImageFolderOp>(num_workers_, dataset_dir_, connector_que_size_, recursive_, decode_, exts_,
+                                            class_indexing_, std::move(schema), std::move(sampler_rt));
   op->set_total_repeats(GetTotalRepeats());
   op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
   node_ops->push_back(op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/manifest_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/manifest_node.cc
index 2d33cc7567..36312d80e4 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/manifest_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/manifest_node.cc
@@ -94,8 +94,8 @@ Status ManifestNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_o
   std::shared_ptr<SamplerRT> sampler_rt = nullptr;
   RETURN_IF_NOT_OK(sampler_->SamplerBuild(&sampler_rt));
 
-  manifest_op = std::make_shared<ManifestOp>(num_workers_, rows_per_buffer_, dataset_file_, connector_que_size_,
-                                             decode_, class_index_, std::move(schema), std::move(sampler_rt), usage_);
+  manifest_op = std::make_shared<ManifestOp>(num_workers_, dataset_file_, connector_que_size_, decode_, class_index_,
+                                             std::move(schema), std::move(sampler_rt), usage_);
   manifest_op->set_total_repeats(GetTotalRepeats());
   manifest_op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
   node_ops->push_back(manifest_op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/mnist_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/mnist_node.cc
index c0e59d195f..e3fa2eca3a 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/mnist_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/mnist_node.cc
@@ -60,8 +60,8 @@ Status MnistNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_ops)
   std::shared_ptr<SamplerRT> sampler_rt = nullptr;
   RETURN_IF_NOT_OK(sampler_->SamplerBuild(&sampler_rt));
 
-  auto op = std::make_shared<MnistOp>(usage_, num_workers_, rows_per_buffer_, dataset_dir_, connector_que_size_,
-                                      std::move(schema), std::move(sampler_rt));
+  auto op = std::make_shared<MnistOp>(usage_, num_workers_, dataset_dir_, connector_que_size_, std::move(schema),
+                                      std::move(sampler_rt));
   op->set_total_repeats(GetTotalRepeats());
   op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
   node_ops->push_back(op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/text_file_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/text_file_node.cc
index 315d220949..58e80b2a4d 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/text_file_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/text_file_node.cc
@@ -82,9 +82,9 @@ Status TextFileNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_o
   RETURN_IF_NOT_OK(schema->AddColumn(ColDescriptor("text", DataType(DataType::DE_UINT8), TensorImpl::kFlexible, 1)));
 
   // Create and initialize TextFileOp
-  std::shared_ptr<TextFileOp> text_file_op = std::make_shared<TextFileOp>(
-    num_workers_, rows_per_buffer_, num_samples_, worker_connector_size_, std::move(schema), sorted_dataset_files,
-    connector_que_size_, shuffle_files, num_shards_, shard_id_);
+  std::shared_ptr<TextFileOp> text_file_op =
+    std::make_shared<TextFileOp>(num_workers_, num_samples_, worker_connector_size_, std::move(schema),
+                                 sorted_dataset_files, connector_que_size_, shuffle_files, num_shards_, shard_id_);
   RETURN_IF_NOT_OK(text_file_op->Init());
 
   if (cache_ == nullptr && shuffle_ == ShuffleMode::kGlobal && !IsDescendantOfCache()) {
@@ -96,8 +96,8 @@ Status TextFileNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_o
     RETURN_IF_NOT_OK(TextFileOp::CountAllFileRows(sorted_dataset_files, &num_rows));
 
     // Add the shuffle op after this op
-    RETURN_IF_NOT_OK(AddShuffleOp(sorted_dataset_files.size(), num_shards_, num_rows, 0, connector_que_size_,
-                                  rows_per_buffer_, &shuffle_op));
+    RETURN_IF_NOT_OK(
+      AddShuffleOp(sorted_dataset_files.size(), num_shards_, num_rows, 0, connector_que_size_, &shuffle_op));
     shuffle_op->set_total_repeats(GetTotalRepeats());
     shuffle_op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
     node_ops->push_back(shuffle_op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/tf_record_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/tf_record_node.cc
index 2d2ce25144..db336343e6 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/tf_record_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/tf_record_node.cc
@@ -124,8 +124,8 @@ Status TFRecordNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_o
 
   // Create and initialize TFReaderOp
   std::shared_ptr<TFReaderOp> tf_reader_op = std::make_shared<TFReaderOp>(
-    num_workers_, worker_connector_size_, rows_per_buffer_, num_samples_, sorted_dir_files, std::move(data_schema),
-    connector_que_size_, columns_list_, shuffle_files, num_shards_, shard_id_, shard_equal_rows_);
+    num_workers_, worker_connector_size_, num_samples_, sorted_dir_files, std::move(data_schema), connector_que_size_,
+    columns_list_, shuffle_files, num_shards_, shard_id_, shard_equal_rows_);
 
   RETURN_IF_NOT_OK(tf_reader_op->Init());
 
@@ -139,8 +139,7 @@ Status TFRecordNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_o
     RETURN_IF_NOT_OK(TFReaderOp::CountTotalRows(&num_rows, sorted_dir_files));
 
     // Add the shuffle op after this op
-    RETURN_IF_NOT_OK(AddShuffleOp(sorted_dir_files.size(), num_shards_, num_rows, 0, connector_que_size_,
-                                  rows_per_buffer_, &shuffle_op));
+    RETURN_IF_NOT_OK(AddShuffleOp(sorted_dir_files.size(), num_shards_, num_rows, 0, connector_que_size_, &shuffle_op));
     shuffle_op->set_total_repeats(GetTotalRepeats());
     shuffle_op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
     node_ops->push_back(shuffle_op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/voc_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/voc_node.cc
index ab1a92c92a..8144dfec17 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/voc_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/source/voc_node.cc
@@ -112,8 +112,8 @@ Status VOCNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_ops) {
   RETURN_IF_NOT_OK(sampler_->SamplerBuild(&sampler_rt));
 
   std::shared_ptr<VOCOp> voc_op;
-  voc_op = std::make_shared<VOCOp>(task_type_, usage_, dataset_dir_, class_index_, num_workers_, rows_per_buffer_,
-                                   connector_que_size_, decode_, std::move(schema), std::move(sampler_rt));
+  voc_op = std::make_shared<VOCOp>(task_type_, usage_, dataset_dir_, class_index_, num_workers_, connector_que_size_,
+                                   decode_, std::move(schema), std::move(sampler_rt));
   voc_op->set_total_repeats(GetTotalRepeats());
   voc_op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
   node_ops->push_back(voc_op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/sync_wait_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/sync_wait_node.cc
index 79871503fe..c58ee30a66 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/sync_wait_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/sync_wait_node.cc
@@ -43,11 +43,9 @@ void SyncWaitNode::Print(std::ostream &out) const {
 
 // Function to build the BarrierOp
 Status SyncWaitNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_ops) {
-  // Right now barrier should only take num_rows_per_buffer = 1
   // The reason for this is because having it otherwise can lead to blocking issues
   // See barrier_op.h for more details
-  const int32_t rows_per_buffer = 1;
-  auto op = std::make_shared<BarrierOp>(rows_per_buffer, connector_que_size_, condition_name_, callback_);
+  auto op = std::make_shared<BarrierOp>(connector_que_size_, condition_name_, callback_);
   op->set_total_repeats(GetTotalRepeats());
   op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
   node_ops->push_back(op);
diff --git a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/zip_node.cc b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/zip_node.cc
index 9aef58823f..88877773d1 100644
--- a/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/zip_node.cc
+++ b/mindspore/ccsrc/minddata/dataset/engine/ir/datasetops/zip_node.cc
@@ -58,7 +58,7 @@ Status ZipNode::ValidateParams() {
 }
 
 Status ZipNode::Build(std::vector<std::shared_ptr<DatasetOp>> *const node_ops) {
-  auto op = std::make_shared<ZipOp>(rows_per_buffer_, connector_que_size_);
+  auto op = std::make_shared<ZipOp>(connector_que_size_);
   op->set_total_repeats(GetTotalRepeats());
   op->set_num_repeats_per_epoch(GetNumRepeatsPerEpoch());
   node_ops->push_back(op);
diff --git a/tests/ut/cpp/dataset/album_op_test.cc b/tests/ut/cpp/dataset/album_op_test.cc
index d347dcb3f6..b28d3ee2e0 100644
--- a/tests/ut/cpp/dataset/album_op_test.cc
+++ b/tests/ut/cpp/dataset/album_op_test.cc
@@ -31,7 +31,7 @@ using mindspore::MsLogLevel::ERROR;
 using mindspore::ExceptionType::NoExceptionType;
 using mindspore::LogStream;
 
-std::shared_ptr<BatchOp> Batch(int batch_size = 1, bool drop = false, int rows_per_buf = 2);
+std::shared_ptr<BatchOp> Batch(int batch_size = 1, bool drop = false);
 
 std::shared_ptr<RepeatOp> Repeat(int repeat_cnt);
 
@@ -42,10 +42,10 @@ std::shared_ptr<AlbumOp> Album(int64_t num_works, int64_t rows, int64_t conns, s
   std::shared_ptr<AlbumOp> so;
   AlbumOp::Builder builder;
   Status rc = builder.SetNumWorkers(num_works)
-                     .SetAlbumDir(path)
-                     .SetRowsPerBuffer(rows)
-                     .SetOpConnectorSize(conns)
-                     .SetExtensions({".json"})
+                .SetAlbumDir(path)
+
+                .SetOpConnectorSize(conns)
+                .SetExtensions({".json"})
                      .SetSampler(std::move(sampler))
                      .SetDecode(decode)
                      .Build(&so);
@@ -59,12 +59,12 @@ std::shared_ptr<AlbumOp> AlbumSchema(int64_t num_works, int64_t rows, int64_t co
   std::shared_ptr<AlbumOp> so;
   AlbumOp::Builder builder;
   Status rc = builder.SetNumWorkers(num_works)
-    .SetSchemaFile(schema_file)
-    .SetColumnsToLoad(column_names)
-    .SetAlbumDir(path)
-    .SetRowsPerBuffer(rows)
-    .SetOpConnectorSize(conns)
-    .SetExtensions({".json"})
+                .SetSchemaFile(schema_file)
+                .SetColumnsToLoad(column_names)
+                .SetAlbumDir(path)
+
+                .SetOpConnectorSize(conns)
+                .SetExtensions({".json"})
     .SetSampler(std::move(sampler))
     .SetDecode(decode)
     .Build(&so);
@@ -180,8 +180,8 @@ TEST_F(MindDataTestAlbum, TestSequentialAlbumWithFullSchema) {
     EXPECT_OK(tensor_map["_priority"]->GetItemAt<double>(&priority, {}));
     EXPECT_OK(tensor_map["id"]->GetItemAt<int64_t>(&id, {}));
     MS_LOG(DEBUG) << "row: " << i << "\t" << tensor_map["image"]->shape() << "label:" << label << "label shape"
-                  << tensor_map["label"]  << "priority: " << priority << " embedding : " 
-                  << tensor_map["_embedding"]->shape() << " id: " << id << "\n";
+                  << tensor_map["label"] << "priority: " << priority
+                  << " embedding : " << tensor_map["_embedding"]->shape() << " id: " << id << "\n";
     i++;
     di.GetNextAsMap(&tensor_map);
   }
diff --git a/tests/ut/cpp/dataset/batch_op_test.cc b/tests/ut/cpp/dataset/batch_op_test.cc
index 2b65e8b3a8..3aac382005 100644
--- a/tests/ut/cpp/dataset/batch_op_test.cc
+++ b/tests/ut/cpp/dataset/batch_op_test.cc
@@ -34,7 +34,7 @@ class MindDataTestBatchOp : public UT::DatasetOpTesting {
  protected:
 };
 
-std::shared_ptr<de::BatchOp> Batch(int32_t batch_size = 1, bool drop = false, int rows_per_buf = 2) {
+std::shared_ptr<de::BatchOp> Batch(int32_t batch_size = 1, bool drop = false) {
   Status rc;
   std::shared_ptr<de::BatchOp> op;
   rc = de::BatchOp::Builder(batch_size).SetDrop(drop).Build(&op);
@@ -50,10 +50,10 @@ std::shared_ptr<de::RepeatOp> Repeat(int repeat_cnt = 1) {
   return op;
 }
 
-std::shared_ptr<de::TFReaderOp> TFReader(std::string schema, int rows_per_buf = 2, int num_works = 8) {
+std::shared_ptr<de::TFReaderOp> TFReader(std::string schema, int num_works = 8) {
   std::shared_ptr<de::TFReaderOp> so;
   de::TFReaderOp::Builder builder;
-  builder.SetDatasetFilesList({schema}).SetRowsPerBuffer(rows_per_buf).SetNumWorkers(num_works);
+  builder.SetDatasetFilesList({schema}).SetNumWorkers(num_works);
   Status rc = builder.Build(&so);
   return so;
 }
@@ -111,7 +111,7 @@ TEST_F(MindDataTestBatchOp, TestRepeatBatchDropTrue) {
   bool success = false;
   auto op1 = TFReader(schema_file);
   auto op2 = Repeat(2);
-  auto op3 = Batch(7, true, 99);
+  auto op3 = Batch(7, true);
   op1->set_total_repeats(2);
   op1->set_num_repeats_per_epoch(2);
   auto tree = Build({op1, op2, op3});
@@ -161,7 +161,7 @@ TEST_F(MindDataTestBatchOp, TestRepeatBatchDropFalse) {
   bool success = false;
   auto op1 = TFReader(schema_file);
   auto op2 = Repeat(2);
-  auto op3 = Batch(7, false, 99);
+  auto op3 = Batch(7, false);
   op1->set_total_repeats(2);
   op1->set_num_repeats_per_epoch(2);
   auto tree = Build({op1, op2, op3});
@@ -217,7 +217,7 @@ TEST_F(MindDataTestBatchOp, TestBatchDropFalseRepeat) {
   std::string schema_file = datasets_root_path_ + "/testBatchDataset/test.data";
   bool success = false;
   auto op1 = TFReader(schema_file);
-  auto op2 = Batch(7, false, 99);
+  auto op2 = Batch(7, false);
   auto op3 = Repeat(2);
   op1->set_total_repeats(2);
   op1->set_num_repeats_per_epoch(2);
@@ -270,7 +270,7 @@ TEST_F(MindDataTestBatchOp, TestBatchDropTrueRepeat) {
   std::string schema_file = datasets_root_path_ + "/testBatchDataset/test.data";
   bool success = false;
   auto op1 = TFReader(schema_file);
-  auto op2 = Batch(5, true, 99);
+  auto op2 = Batch(5, true);
   auto op3 = Repeat(2);
   op1->set_total_repeats(2);
   op1->set_num_repeats_per_epoch(2);
diff --git a/tests/ut/cpp/dataset/cache_op_test.cc b/tests/ut/cpp/dataset/cache_op_test.cc
index 44af34c222..afa69efffc 100644
--- a/tests/ut/cpp/dataset/cache_op_test.cc
+++ b/tests/ut/cpp/dataset/cache_op_test.cc
@@ -253,7 +253,7 @@ TEST_F(MindDataTestCacheOp, DISABLED_TestRandomDataCache1) {
   // RandomDataOp
   std::shared_ptr<RandomDataOp> myRandomDataOp;
   rc = RandomDataOp::Builder()
-         .SetRowsPerBuffer(4)
+
          .SetNumWorkers(4)
          .SetDataSchema(std::move(testSchema))
          .SetTotalRows(50)  // 50 samples for now
@@ -277,7 +277,7 @@ TEST_F(MindDataTestCacheOp, DISABLED_TestRandomDataCache1) {
   rc = CacheOp::Builder()
          .SetNumWorkers(5)
          .SetClient(myClient)
-         .SetRowsPerBuffer(1)
+
          .SetSampler(std::move(seq_sampler))
          .Build(&myCacheOp);
   ASSERT_TRUE(rc.IsOk());
@@ -379,7 +379,7 @@ TEST_F(MindDataTestCacheOp, DISABLED_TestRandomDataCacheSpill) {
   // RandomDataOp
   std::shared_ptr<RandomDataOp> myRandomDataOp;
   rc = RandomDataOp::Builder()
-         .SetRowsPerBuffer(2)
+
          .SetNumWorkers(4)
          .SetDataSchema(std::move(testSchema))
          .SetTotalRows(10)
@@ -401,7 +401,6 @@ TEST_F(MindDataTestCacheOp, DISABLED_TestRandomDataCacheSpill) {
   rc = CacheOp::Builder()
          .SetNumWorkers(4)
          .SetClient(myClient)
-         .SetRowsPerBuffer(3)
          .SetSampler(std::move(seq_sampler))
          .Build(&myCacheOp);
   ASSERT_TRUE(rc.IsOk());
@@ -484,7 +483,7 @@ TEST_F(MindDataTestCacheOp, DISABLED_TestImageFolderCacheMerge) {
   ImageFolderOp::Builder builder;
   builder.SetOpConnectorSize(3)
     .SetNumWorkers(3)
-    .SetRowsPerBuffer(2)
+
     .SetExtensions({".jpg", ".JPEG"})
     .SetRecursive(true)
     .SetImageFolderDir(datasets_root_path_ + "/testPK/data");
diff --git a/tests/ut/cpp/dataset/celeba_op_test.cc b/tests/ut/cpp/dataset/celeba_op_test.cc
index 202a6a8c95..9d69b8bcda 100644
--- a/tests/ut/cpp/dataset/celeba_op_test.cc
+++ b/tests/ut/cpp/dataset/celeba_op_test.cc
@@ -26,41 +26,45 @@
 #include "securec.h"
 
 using namespace mindspore::dataset;
-using mindspore::MsLogLevel::ERROR;
-using mindspore::ExceptionType::NoExceptionType;
 using mindspore::LogStream;
+using mindspore::ExceptionType::NoExceptionType;
+using mindspore::MsLogLevel::ERROR;
 
 std::shared_ptr<RepeatOp> Repeat(int repeat_cnt);
 
 std::shared_ptr<ExecutionTree> Build(std::vector<std::shared_ptr<DatasetOp>> ops);
 
-std::shared_ptr<CelebAOp> Celeba(int32_t num_workers, int32_t rows_per_buffer, int32_t queue_size,
-                                 const std::string &dir, std::shared_ptr<SamplerRT> sampler = nullptr,
-                                 bool decode = false, const std::string &dataset_type = "all") {
+std::shared_ptr<CelebAOp> Celeba(int32_t num_workers, int32_t queue_size, const std::string &dir,
+                                 std::shared_ptr<SamplerRT> sampler = nullptr, bool decode = false,
+                                 const std::string &dataset_type = "all") {
   std::shared_ptr<CelebAOp> so;
   CelebAOp::Builder builder;
   Status rc = builder.SetNumWorkers(num_workers)
                 .SetCelebADir(dir)
-                .SetRowsPerBuffer(rows_per_buffer)
                 .SetOpConnectorSize(queue_size)
                 .SetSampler(std::move(sampler))
                 .SetDecode(decode)
-                .SetUsage(dataset_type).Build(&so);
+                .SetUsage(dataset_type)
+                .Build(&so);
   return so;
 }
 
 class MindDataTestCelebaDataset : public UT::DatasetOpTesting {
-protected:
+ protected:
 };
 
 TEST_F(MindDataTestCelebaDataset, TestSequentialCeleba) {
   std::string dir = datasets_root_path_ + "/testCelebAData/";
-  uint32_t expect_labels[4][40] = {{0,1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,1,0,1,0,0,1,0,0,1,0,0,0,1,1,0,1,0,1,0,0,1},
-                                   {0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,0,1,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1},
-                                   {0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,0,1,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1},
-                                   {0,1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,1,0,1,0,0,1,0,0,1,0,0,0,1,1,0,1,0,1,0,0,1}};
+  uint32_t expect_labels[4][40] = {{0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1,
+                                    0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1},
+                                   {0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1,
+                                    0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1},
+                                   {0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1,
+                                    0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1},
+                                   {0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1,
+                                    0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1}};
   uint32_t count = 0;
-  auto tree = Build({Celeba(16, 2, 32, dir)});
+  auto tree = Build({Celeba(16, 2, dir)});
   tree->Prepare();
   Status rc = tree->Launch();
   if (rc.IsError()) {
@@ -86,16 +90,24 @@ TEST_F(MindDataTestCelebaDataset, TestSequentialCeleba) {
 
 TEST_F(MindDataTestCelebaDataset, TestCelebaRepeat) {
   std::string dir = datasets_root_path_ + "/testCelebAData/";
-  uint32_t expect_labels[8][40] = {{0,1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,1,0,1,0,0,1,0,0,1,0,0,0,1,1,0,1,0,1,0,0,1},
-                                   {0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,0,1,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1},
-                                   {0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,0,1,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1},
-                                   {0,1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,1,0,1,0,0,1,0,0,1,0,0,0,1,1,0,1,0,1,0,0,1},
-                                   {0,1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,1,0,1,0,0,1,0,0,1,0,0,0,1,1,0,1,0,1,0,0,1},
-                                   {0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,0,1,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1},
-                                   {0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,0,1,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1},
-                                   {0,1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,1,0,1,0,0,1,0,0,1,0,0,0,1,1,0,1,0,1,0,0,1}};
+  uint32_t expect_labels[8][40] = {{0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1,
+                                    0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1},
+                                   {0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1,
+                                    0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1},
+                                   {0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1,
+                                    0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1},
+                                   {0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1,
+                                    0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1},
+                                   {0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1,
+                                    0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1},
+                                   {0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1,
+                                    0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1},
+                                   {0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1,
+                                    0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1},
+                                   {0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1,
+                                    0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1}};
   uint32_t count = 0;
-  auto op1 = Celeba(16, 2, 32, dir);
+  auto op1 = Celeba(16, 2, dir);
   auto op2 = Repeat(2);
   auto tree = Build({op1, op2});
   op1->set_total_repeats(2);
@@ -131,7 +143,7 @@ TEST_F(MindDataTestCelebaDataset, TestSubsetRandomSamplerCeleba) {
                                     0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1}};
   std::string dir = datasets_root_path_ + "/testCelebAData/";
   uint32_t count = 0;
-  auto tree = Build({Celeba(16, 2, 32, dir, std::move(sampler))});
+  auto tree = Build({Celeba(16, 2, dir, std::move(sampler))});
   tree->Prepare();
   Status rc = tree->Launch();
   if (rc.IsError()) {
diff --git a/tests/ut/cpp/dataset/cifar_op_test.cc b/tests/ut/cpp/dataset/cifar_op_test.cc
index caa77a3aed..f807174a5b 100644
--- a/tests/ut/cpp/dataset/cifar_op_test.cc
+++ b/tests/ut/cpp/dataset/cifar_op_test.cc
@@ -47,7 +47,7 @@ std::shared_ptr<CifarOp> Cifarop(uint64_t num_works, uint64_t rows, uint64_t con
   CifarOp::Builder builder;
   Status rc = builder.SetNumWorkers(num_works)
                 .SetCifarDir(path)
-                .SetRowsPerBuffer(rows)
+
                 .SetOpConnectorSize(conns)
                 .SetSampler(std::move(sampler))
                 .SetCifarType(cifar10)
diff --git a/tests/ut/cpp/dataset/client_config_test.cc b/tests/ut/cpp/dataset/client_config_test.cc
index a22d9f6b51..3dbe94defa 100644
--- a/tests/ut/cpp/dataset/client_config_test.cc
+++ b/tests/ut/cpp/dataset/client_config_test.cc
@@ -45,20 +45,17 @@ TEST_F(MindDataTestClientConfig, TestClientConfig1) {
   std::shared_ptr<ConfigManager> my_conf = GlobalContext::config_manager();
 
   ASSERT_EQ(my_conf->num_parallel_workers(), kCfgParallelWorkers);
-  ASSERT_EQ(my_conf->rows_per_buffer(), kCfgRowsPerBuffer);
   ASSERT_EQ(my_conf->worker_connector_size(), kCfgWorkerConnectorSize);
   ASSERT_EQ(my_conf->op_connector_size(), kCfgOpConnectorSize);
   ASSERT_EQ(my_conf->seed(), kCfgDefaultSeed);
 
   my_conf->set_num_parallel_workers(2);
-  my_conf->set_rows_per_buffer(1);
   my_conf->set_worker_connector_size(3);
   my_conf->set_op_connector_size(4);
   my_conf->set_seed(5);
 
 
   ASSERT_EQ(my_conf->num_parallel_workers(), 2);
-  ASSERT_EQ(my_conf->rows_per_buffer(), 1);
   ASSERT_EQ(my_conf->worker_connector_size(), 3);
   ASSERT_EQ(my_conf->op_connector_size(), 4);
   ASSERT_EQ(my_conf->seed(), 5);
@@ -67,7 +64,6 @@ TEST_F(MindDataTestClientConfig, TestClientConfig1) {
   ASSERT_TRUE(my_conf->LoadFile(file));
 
   ASSERT_EQ(my_conf->num_parallel_workers(), kCfgParallelWorkers);
-  ASSERT_EQ(my_conf->rows_per_buffer(), kCfgRowsPerBuffer);
   ASSERT_EQ(my_conf->worker_connector_size(), kCfgWorkerConnectorSize);
   ASSERT_EQ(my_conf->op_connector_size(), kCfgOpConnectorSize);
   ASSERT_EQ(my_conf->seed(), kCfgDefaultSeed);
diff --git a/tests/ut/cpp/dataset/clue_op_test.cc b/tests/ut/cpp/dataset/clue_op_test.cc
index e9be170cd6..5433a84e56 100644
--- a/tests/ut/cpp/dataset/clue_op_test.cc
+++ b/tests/ut/cpp/dataset/clue_op_test.cc
@@ -50,7 +50,7 @@ TEST_F(MindDataTestCLUEOp, TestCLUEBasic) {
   std::shared_ptr<ClueOp> op;
   ClueOp::Builder builder;
   builder.SetClueFilesList({dataset_path})
-    .SetRowsPerBuffer(16)
+
     .SetOpConnectorSize(2)
     .SetColsKeyMap(key_map);
 
diff --git a/tests/ut/cpp/dataset/coco_op_test.cc b/tests/ut/cpp/dataset/coco_op_test.cc
index 4b2f1c7bcd..7910ef8678 100644
--- a/tests/ut/cpp/dataset/coco_op_test.cc
+++ b/tests/ut/cpp/dataset/coco_op_test.cc
@@ -43,7 +43,7 @@ using mindspore::MsLogLevel::ERROR;
 using mindspore::ExceptionType::NoExceptionType;
 using mindspore::LogStream;
 
-std::shared_ptr<BatchOp> Batch(int batch_size = 1, bool drop = false, int rows_per_buf = 2);
+std::shared_ptr<BatchOp> Batch(int batch_size = 1, bool drop = false);
 
 std::shared_ptr<ExecutionTree> Build(std::vector<std::shared_ptr<DatasetOp>> ops);
 
diff --git a/tests/ut/cpp/dataset/concat_op_test.cc b/tests/ut/cpp/dataset/concat_op_test.cc
index 301d8be560..e1730b22d6 100644
--- a/tests/ut/cpp/dataset/concat_op_test.cc
+++ b/tests/ut/cpp/dataset/concat_op_test.cc
@@ -51,7 +51,7 @@ TEST_F(MindDataTestConcatOp, TestConcatProject) {
   // TFReaderOp1
   std::shared_ptr<TFReaderOp> my_tfreader_op1;
   TFReaderOp::Builder builder1;
-  builder1.SetDatasetFilesList({dataset_path}).SetRowsPerBuffer(16).SetWorkerConnectorSize(16);
+  builder1.SetDatasetFilesList({dataset_path}).SetWorkerConnectorSize(16);
   std::unique_ptr<DataSchema> schema1 = std::make_unique<DataSchema>();
   schema1->LoadSchemaFile(datasets_root_path_ + "/testTFTestAllTypes/datasetSchema1Row.json", {});
   builder1.SetDataSchema(std::move(schema1));
@@ -63,7 +63,7 @@ TEST_F(MindDataTestConcatOp, TestConcatProject) {
   // TFReaderOp2
   std::shared_ptr<TFReaderOp> my_tfreader_op2;
   TFReaderOp::Builder builder2;
-  builder2.SetDatasetFilesList({dataset_path}).SetRowsPerBuffer(16).SetWorkerConnectorSize(16);
+  builder2.SetDatasetFilesList({dataset_path}).SetWorkerConnectorSize(16);
   std::unique_ptr<DataSchema> schema2 = std::make_unique<DataSchema>();
   schema2->LoadSchemaFile(datasets_root_path_ + "/testTFTestAllTypes/datasetSchema1Row.json", {});
   builder2.SetDataSchema(std::move(schema2));
diff --git a/tests/ut/cpp/dataset/csv_op_test.cc b/tests/ut/cpp/dataset/csv_op_test.cc
index 8e5f8ebddc..40aa6eec03 100644
--- a/tests/ut/cpp/dataset/csv_op_test.cc
+++ b/tests/ut/cpp/dataset/csv_op_test.cc
@@ -52,7 +52,7 @@ TEST_F(MindDataTestCSVOp, TestCSVBasic) {
   std::shared_ptr<CsvOp> op;
   CsvOp::Builder builder;
   builder.SetCsvFilesList({dataset_path})
-    .SetRowsPerBuffer(16)
+
     .SetShuffleFiles(false)
     .SetOpConnectorSize(2)
     .SetFieldDelim(',')
diff --git a/tests/ut/cpp/dataset/execution_tree_test.cc b/tests/ut/cpp/dataset/execution_tree_test.cc
index b871dd00d8..87fd5cb785 100644
--- a/tests/ut/cpp/dataset/execution_tree_test.cc
+++ b/tests/ut/cpp/dataset/execution_tree_test.cc
@@ -44,19 +44,15 @@ TEST_F(MindDataTestExecutionTree, TestExecutionTree1) {
   uint32_t shuffle_size = 32;
   uint32_t connector_size = 8;
 
-
-  std::shared_ptr<ShuffleOp> leaf_op1 =
-      std::make_shared<ShuffleOp>(shuffle_size, 0, connector_size, false, 32);
+  std::shared_ptr<ShuffleOp> leaf_op1 = std::make_shared<ShuffleOp>(shuffle_size, 0, connector_size, false);
   ASSERT_NE(leaf_op1, nullptr);
   my_tree->AssociateNode(leaf_op1);
   shuffle_size = 16;
-  std::shared_ptr<ShuffleOp> leaf_op2 =
-      std::make_shared<ShuffleOp>(shuffle_size, 0,  connector_size, false, 32);
+  std::shared_ptr<ShuffleOp> leaf_op2 = std::make_shared<ShuffleOp>(shuffle_size, 0, connector_size, false);
   ASSERT_NE(leaf_op2, nullptr);
   my_tree->AssociateNode(leaf_op2);
   shuffle_size = 8;
-  std::shared_ptr<ShuffleOp> parent_op =
-      std::make_shared<ShuffleOp>(shuffle_size, 0, connector_size, false, 32);
+  std::shared_ptr<ShuffleOp> parent_op = std::make_shared<ShuffleOp>(shuffle_size, 0, connector_size, false);
   ASSERT_NE(parent_op, nullptr);
   my_tree->AssociateNode(parent_op);
 
@@ -68,8 +64,7 @@ TEST_F(MindDataTestExecutionTree, TestExecutionTree1) {
   parent_op->AddChild(std::move(leaf_op1));
   parent_op->AddChild(std::move(leaf_op2));
   shuffle_size = 4;
-  std::shared_ptr<DatasetOp> root_op =
-      std::make_shared<ShuffleOp>(shuffle_size, 0, connector_size, false, 32);
+  std::shared_ptr<DatasetOp> root_op = std::make_shared<ShuffleOp>(shuffle_size, 0, connector_size, false);
   my_tree->AssignRoot(root_op);
   root_op->AddChild(parent_op);
   ASSERT_NE(root_op, nullptr);
@@ -105,10 +100,10 @@ TEST_F(MindDataTestExecutionTree, TestExecutionTree2) {
   std::string dataset_path = datasets_root_path_ + "/testDataset1/testDataset1.data";
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   TFReaderOp::Builder()
-      .SetDatasetFilesList({dataset_path})
-      .SetRowsPerBuffer(2)
-      .SetWorkerConnectorSize(2)
-      .SetNumWorkers(2)
+    .SetDatasetFilesList({dataset_path})
+
+    .SetWorkerConnectorSize(2)
+    .SetNumWorkers(2)
       .Build(&my_tfreader_op);
 
   my_tree->AssociateNode(my_tfreader_op);
diff --git a/tests/ut/cpp/dataset/image_folder_op_test.cc b/tests/ut/cpp/dataset/image_folder_op_test.cc
index 8383563440..de9c6eb550 100644
--- a/tests/ut/cpp/dataset/image_folder_op_test.cc
+++ b/tests/ut/cpp/dataset/image_folder_op_test.cc
@@ -40,7 +40,7 @@ using mindspore::LogStream;
 using mindspore::ExceptionType::NoExceptionType;
 using mindspore::MsLogLevel::ERROR;
 
-std::shared_ptr<BatchOp> Batch(int batch_size = 1, bool drop = false, int rows_per_buf = 2);
+std::shared_ptr<BatchOp> Batch(int batch_size = 1, bool drop = false);
 
 std::shared_ptr<RepeatOp> Repeat(int repeat_cnt);
 
@@ -53,7 +53,7 @@ std::shared_ptr<ImageFolderOp> ImageFolder(int64_t num_works, int64_t rows, int6
   ImageFolderOp::Builder builder;
   Status rc = builder.SetNumWorkers(num_works)
                 .SetImageFolderDir(path)
-                .SetRowsPerBuffer(rows)
+
                 .SetOpConnectorSize(conns)
                 .SetExtensions({".jpg", ".JPEG"})
                 .SetSampler(std::move(sampler))
diff --git a/tests/ut/cpp/dataset/ir_callback_test.cc b/tests/ut/cpp/dataset/ir_callback_test.cc
index 229918f8e9..1fe30e493c 100644
--- a/tests/ut/cpp/dataset/ir_callback_test.cc
+++ b/tests/ut/cpp/dataset/ir_callback_test.cc
@@ -156,7 +156,7 @@ TEST_F(MindDataTestCallback, TestBasicCallback) {
   ColDescriptor col("label", DataType(DataType::DE_UINT32), TensorImpl::kFlexible, 0, &shape);
   ASSERT_OK(schema->AddColumn(col));
   std::shared_ptr<RandomDataOp> leaf;
-  rc = RandomDataOp::Builder().SetRowsPerBuffer(1).SetDataSchema(std::move(schema)).SetTotalRows(44).Build(&leaf);
+  rc = RandomDataOp::Builder().SetDataSchema(std::move(schema)).SetTotalRows(44).Build(&leaf);
   EXPECT_TRUE(rc.IsOk());
   // config mapOp
   std::shared_ptr<MapOp> map_op;
@@ -208,7 +208,7 @@ TEST_F(MindDataTestCallback, TestMultiEpochCallback) {
   ColDescriptor col("label", DataType(DataType::DE_UINT32), TensorImpl::kFlexible, 0, &shape);
   ASSERT_OK(schema->AddColumn(col));
   std::shared_ptr<RandomDataOp> leaf;
-  rc = RandomDataOp::Builder().SetRowsPerBuffer(1).SetDataSchema(std::move(schema)).SetTotalRows(4).SetNumWorkers(4).Build(&leaf);
+  rc = RandomDataOp::Builder().SetDataSchema(std::move(schema)).SetTotalRows(4).SetNumWorkers(4).Build(&leaf);
   EXPECT_TRUE(rc.IsOk());
   // config mapOp
   std::shared_ptr<MapOp> map_op;
@@ -273,7 +273,7 @@ TEST_F(MindDataTestCallback, TestSelectedCallback) {
   ColDescriptor col("label", DataType(DataType::DE_UINT32), TensorImpl::kFlexible, 0, &shape);
   ASSERT_OK(schema->AddColumn(col));
   std::shared_ptr<RandomDataOp> leaf;
-  rc = RandomDataOp::Builder().SetRowsPerBuffer(1).SetDataSchema(std::move(schema)).SetTotalRows(4).SetNumWorkers(4).Build(&leaf);
+  rc = RandomDataOp::Builder().SetDataSchema(std::move(schema)).SetTotalRows(4).SetNumWorkers(4).Build(&leaf);
   EXPECT_TRUE(rc.IsOk());
   // config mapOp
   std::shared_ptr<MapOp> map_op;
diff --git a/tests/ut/cpp/dataset/manifest_op_test.cc b/tests/ut/cpp/dataset/manifest_op_test.cc
index dbc45345ab..ae6114eadf 100644
--- a/tests/ut/cpp/dataset/manifest_op_test.cc
+++ b/tests/ut/cpp/dataset/manifest_op_test.cc
@@ -46,9 +46,14 @@ std::shared_ptr<ManifestOp> Manifest(int32_t num_works, int32_t rows, int32_t co
                                      std::map<std::string, int32_t> map = {}, bool decode = false) {
   std::shared_ptr<ManifestOp> so;
   ManifestOp::Builder builder;
-  Status rc = builder.SetNumWorkers(num_works).SetManifestFile(file).SetRowsPerBuffer(
-      rows).SetOpConnectorSize(conns).SetSampler(std::move(sampler)).SetClassIndex(map).SetDecode(decode)
-      .SetUsage(usage).Build(&so);
+  Status rc = builder.SetNumWorkers(num_works)
+                .SetManifestFile(file)
+                .SetOpConnectorSize(conns)
+                .SetSampler(std::move(sampler))
+                .SetClassIndex(map)
+                .SetDecode(decode)
+                .SetUsage(usage)
+                .Build(&so);
   return so;
 }
 
diff --git a/tests/ut/cpp/dataset/map_op_test.cc b/tests/ut/cpp/dataset/map_op_test.cc
index 64dd8bc15a..791170fc9c 100644
--- a/tests/ut/cpp/dataset/map_op_test.cc
+++ b/tests/ut/cpp/dataset/map_op_test.cc
@@ -110,7 +110,7 @@ class MindDataTestMapOp : public UT::DatasetOpTesting {
     TFReaderOp::Builder builder;
     builder.SetDatasetFilesList({dataset_path_})
       .SetColumnsToLoad({"image", "label", "A", "B"})
-      .SetRowsPerBuffer(2)
+
       .SetWorkerConnectorSize(2)
       .SetNumWorkers(2);
 
@@ -516,7 +516,7 @@ TEST_F(MindDataTestMapOp, TFReader_Decode_Repeat_Resize) {
   TFReaderOp::Builder sobuilder;
   sobuilder.SetDatasetFilesList({dataset_path_})
     .SetColumnsToLoad({"image", "label"})
-    .SetRowsPerBuffer(2)
+
     .SetWorkerConnectorSize(2)
     .SetNumWorkers(2);
   rc = sobuilder.Build(&my_tfreader_op);
diff --git a/tests/ut/cpp/dataset/mind_record_op_test.cc b/tests/ut/cpp/dataset/mind_record_op_test.cc
index 81da99453f..caa884bf7b 100644
--- a/tests/ut/cpp/dataset/mind_record_op_test.cc
+++ b/tests/ut/cpp/dataset/mind_record_op_test.cc
@@ -29,12 +29,11 @@
 namespace common = mindspore::common;
 
 using namespace mindspore::dataset;
-using mindspore::MsLogLevel::INFO;
-using mindspore::ExceptionType::NoExceptionType;
 using mindspore::LogStream;
+using mindspore::ExceptionType::NoExceptionType;
+using mindspore::MsLogLevel::INFO;
 
-class MindDataTestMindRecordOp : public UT::DatasetOpTesting {
-};
+class MindDataTestMindRecordOp : public UT::DatasetOpTesting {};
 
 TEST_F(MindDataTestMindRecordOp, TestMindRecordBasic) {
   // single MindRecord op and nothing else
@@ -63,10 +62,9 @@ TEST_F(MindDataTestMindRecordOp, TestMindRecordBasic) {
   std::shared_ptr<MindRecordOp> my_mindrecord_op;
   MindRecordOp::Builder builder;
   builder.SetDatasetFile({mindrecord_root_path_ + "/testMindDataSet/testImageNetData/imagenet.mindrecord0"})
-      .SetLoadDataset(true)
-      .SetRowsPerBuffer(3)
-      .SetNumMindRecordWorkers(4)
-      .SetColumnsToLoad(column_list);
+    .SetLoadDataset(true)
+    .SetNumMindRecordWorkers(4)
+    .SetColumnsToLoad(column_list);
   rc = builder.Build(&my_mindrecord_op);
   ASSERT_TRUE(rc.IsOk());
 
@@ -134,11 +132,10 @@ TEST_F(MindDataTestMindRecordOp, TestMindRecordSample) {
   std::shared_ptr<MindRecordOp> my_mindrecord_op;
   MindRecordOp::Builder builder;
   builder.SetDatasetFile({mindrecord_root_path_ + "/testMindDataSet/testImageNetData/imagenet.mindrecord0"})
-      .SetLoadDataset(true)
-      .SetRowsPerBuffer(3)
-      .SetNumMindRecordWorkers(4)
-      .SetColumnsToLoad(column_list)
-      .SetOperators(operators);
+    .SetLoadDataset(true)
+    .SetNumMindRecordWorkers(4)
+    .SetColumnsToLoad(column_list)
+    .SetOperators(operators);
   rc = builder.Build(&my_mindrecord_op);
   ASSERT_TRUE(rc.IsOk());
 
@@ -206,11 +203,10 @@ TEST_F(MindDataTestMindRecordOp, TestMindRecordShuffle) {
   std::shared_ptr<MindRecordOp> my_mindrecord_op;
   MindRecordOp::Builder builder;
   builder.SetDatasetFile({mindrecord_root_path_ + "/testMindDataSet/testImageNetData/imagenet.mindrecord0"})
-      .SetLoadDataset(true)
-      .SetRowsPerBuffer(3)
-      .SetNumMindRecordWorkers(4)
-      .SetColumnsToLoad(column_list)
-      .SetOperators(operators);
+    .SetLoadDataset(true)
+    .SetNumMindRecordWorkers(4)
+    .SetColumnsToLoad(column_list)
+    .SetOperators(operators);
   rc = builder.Build(&my_mindrecord_op);
   ASSERT_TRUE(rc.IsOk());
 
@@ -281,11 +277,10 @@ TEST_F(MindDataTestMindRecordOp, TestMindRecordCategory) {
   std::shared_ptr<MindRecordOp> my_mindrecord_op;
   MindRecordOp::Builder builder;
   builder.SetDatasetFile({mindrecord_root_path_ + "/testMindDataSet/testImageNetData/imagenet.mindrecord0"})
-      .SetLoadDataset(true)
-      .SetRowsPerBuffer(3)
-      .SetNumMindRecordWorkers(4)
-      .SetColumnsToLoad(column_list)
-      .SetOperators(operators);
+    .SetLoadDataset(true)
+    .SetNumMindRecordWorkers(4)
+    .SetColumnsToLoad(column_list)
+    .SetOperators(operators);
   rc = builder.Build(&my_mindrecord_op);
   ASSERT_TRUE(rc.IsOk());
 
@@ -350,10 +345,9 @@ TEST_F(MindDataTestMindRecordOp, TestMindRecordRepeat) {
   std::shared_ptr<MindRecordOp> my_mindrecord_op;
   MindRecordOp::Builder builder;
   builder.SetDatasetFile({mindrecord_root_path_ + "/testMindDataSet/testImageNetData/imagenet.mindrecord0"})
-      .SetLoadDataset(true)
-      .SetRowsPerBuffer(3)
-      .SetNumMindRecordWorkers(4)
-      .SetColumnsToLoad(column_list);
+    .SetLoadDataset(true)
+    .SetNumMindRecordWorkers(4)
+    .SetColumnsToLoad(column_list);
   rc = builder.Build(&my_mindrecord_op);
   ASSERT_TRUE(rc.IsOk());
 
@@ -364,8 +358,7 @@ TEST_F(MindDataTestMindRecordOp, TestMindRecordRepeat) {
 
   uint32_t num_repeats = 2;
   std::shared_ptr<RepeatOp> my_repeat_op;
-  rc = RepeatOp::Builder(num_repeats)
-      .Build(&my_repeat_op);
+  rc = RepeatOp::Builder(num_repeats).Build(&my_repeat_op);
   EXPECT_TRUE(rc.IsOk());
   rc = my_tree->AssociateNode(my_repeat_op);
   EXPECT_TRUE(rc.IsOk());
@@ -375,7 +368,6 @@ TEST_F(MindDataTestMindRecordOp, TestMindRecordRepeat) {
   rc = my_repeat_op->AddChild(my_mindrecord_op);
   EXPECT_TRUE(rc.IsOk());
 
-
   // Set children/root layout.
   rc = my_tree->AssignRoot(my_repeat_op);
   EXPECT_TRUE(rc.IsOk());
@@ -407,7 +399,6 @@ TEST_F(MindDataTestMindRecordOp, TestMindRecordRepeat) {
   }
 }
 
-
 TEST_F(MindDataTestMindRecordOp, TestMindRecordBlockReaderRepeat) {
   // single MindRecord op and nothing else
   //
@@ -435,10 +426,9 @@ TEST_F(MindDataTestMindRecordOp, TestMindRecordBlockReaderRepeat) {
   std::shared_ptr<MindRecordOp> my_mindrecord_op;
   MindRecordOp::Builder builder;
   builder.SetDatasetFile({mindrecord_root_path_ + "/testMindDataSet/testImageNetData/imagenet.mindrecord0"})
-      .SetLoadDataset(true)
-      .SetRowsPerBuffer(3)
-      .SetNumMindRecordWorkers(4)
-      .SetColumnsToLoad(column_list);
+    .SetLoadDataset(true)
+    .SetNumMindRecordWorkers(4)
+    .SetColumnsToLoad(column_list);
   rc = builder.Build(&my_mindrecord_op);
   ASSERT_TRUE(rc.IsOk());
 
@@ -449,8 +439,7 @@ TEST_F(MindDataTestMindRecordOp, TestMindRecordBlockReaderRepeat) {
 
   uint32_t num_repeats = 2;
   std::shared_ptr<RepeatOp> my_repeat_op;
-  rc = RepeatOp::Builder(num_repeats)
-      .Build(&my_repeat_op);
+  rc = RepeatOp::Builder(num_repeats).Build(&my_repeat_op);
   EXPECT_TRUE(rc.IsOk());
   rc = my_tree->AssociateNode(my_repeat_op);
   EXPECT_TRUE(rc.IsOk());
@@ -518,10 +507,9 @@ TEST_F(MindDataTestMindRecordOp, TestMindRecordInvalidColumnList) {
   std::shared_ptr<MindRecordOp> my_mindrecord_op;
   MindRecordOp::Builder builder;
   builder.SetDatasetFile({mindrecord_root_path_ + "/testMindDataSet/testImageNetData/imagenet.mindrecord0"})
-      .SetLoadDataset(true)
-      .SetRowsPerBuffer(3)
-      .SetNumMindRecordWorkers(4)
-      .SetColumnsToLoad(column_list);
+    .SetLoadDataset(true)
+    .SetNumMindRecordWorkers(4)
+    .SetColumnsToLoad(column_list);
   rc = builder.Build(&my_mindrecord_op);
   ASSERT_TRUE(rc.IsError());
   ASSERT_TRUE(rc.ToString().find_first_of("illegal column list") != std::string::npos);
diff --git a/tests/ut/cpp/dataset/mnist_op_test.cc b/tests/ut/cpp/dataset/mnist_op_test.cc
index 814bc687f5..13e6a23b21 100644
--- a/tests/ut/cpp/dataset/mnist_op_test.cc
+++ b/tests/ut/cpp/dataset/mnist_op_test.cc
@@ -42,7 +42,7 @@ using mindspore::MsLogLevel::ERROR;
 using mindspore::ExceptionType::NoExceptionType;
 using mindspore::LogStream;
 
-std::shared_ptr<BatchOp> Batch(int batch_size = 1, bool drop = false, int rows_per_buf = 2);
+std::shared_ptr<BatchOp> Batch(int batch_size = 1, bool drop = false);
 
 std::shared_ptr<RepeatOp> Repeat(int repeat_cnt);
 
@@ -57,7 +57,7 @@ std::shared_ptr<MnistOp> CreateMnist(int64_t num_wrks, int64_t rows, int64_t con
   MnistOp::Builder builder;
   Status rc = builder.SetNumWorkers(num_wrks)
                 .SetDir(path)
-                .SetRowsPerBuffer(rows)
+
                 .SetOpConnectorSize(conns)
                 .SetSampler(std::move(sampler))
                 .Build(&so);
diff --git a/tests/ut/cpp/dataset/project_op_test.cc b/tests/ut/cpp/dataset/project_op_test.cc
index 1f5d24cf7b..5c8fdabb2d 100644
--- a/tests/ut/cpp/dataset/project_op_test.cc
+++ b/tests/ut/cpp/dataset/project_op_test.cc
@@ -41,7 +41,7 @@ TEST_F(MindDataTestProjectOp, TestProjectProject) {
 
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   TFReaderOp::Builder builder;
-  builder.SetDatasetFilesList({dataset_path}).SetRowsPerBuffer(16).SetWorkerConnectorSize(16);
+  builder.SetDatasetFilesList({dataset_path}).SetWorkerConnectorSize(16);
   std::unique_ptr<DataSchema> schema = std::make_unique<DataSchema>();
   schema->LoadSchemaFile(datasets_root_path_ + "/testTFTestAllTypes/datasetSchema.json", {});
   builder.SetDataSchema(std::move(schema));
diff --git a/tests/ut/cpp/dataset/random_data_op_test.cc b/tests/ut/cpp/dataset/random_data_op_test.cc
index ac1a5013fe..694418728b 100644
--- a/tests/ut/cpp/dataset/random_data_op_test.cc
+++ b/tests/ut/cpp/dataset/random_data_op_test.cc
@@ -76,11 +76,7 @@ TEST_F(MindDataTestRandomDataOp, RandomDataOpBasic1) {
   std::shared_ptr<RandomDataOp> myRandomDataOp;
   RandomDataOp::Builder builder;
 
-  rc = builder.SetRowsPerBuffer(2)
-    .SetNumWorkers(1)
-    .SetDataSchema(std::move(testSchema))
-    .SetTotalRows(25)
-    .Build(&myRandomDataOp);
+  rc = builder.SetNumWorkers(1).SetDataSchema(std::move(testSchema)).SetTotalRows(25).Build(&myRandomDataOp);
   EXPECT_TRUE(rc.IsOk());
 
   rc = myTree->AssociateNode(myRandomDataOp);
@@ -134,9 +130,7 @@ TEST_F(MindDataTestRandomDataOp, RandomDataOpBasic2) {
   std::shared_ptr<RandomDataOp> myRandomDataOp;
   RandomDataOp::Builder builder;
 
-  rc = builder.SetRowsPerBuffer(2)
-    .SetNumWorkers(1)
-    .Build(&myRandomDataOp);
+  rc = builder.SetNumWorkers(1).Build(&myRandomDataOp);
   EXPECT_TRUE(rc.IsOk());
 
   rc = myTree->AssociateNode(myRandomDataOp);
@@ -171,11 +165,7 @@ TEST_F(MindDataTestRandomDataOp, RandomDataOpBasic3) {
   std::shared_ptr<RandomDataOp> myRandomDataOp;
   RandomDataOp::Builder builder;
 
-  rc = builder.SetRowsPerBuffer(2)
-    .SetNumWorkers(1)
-    .SetDataSchema(std::move(testSchema))
-    .SetTotalRows(10)
-    .Build(&myRandomDataOp);
+  rc = builder.SetNumWorkers(1).SetDataSchema(std::move(testSchema)).SetTotalRows(10).Build(&myRandomDataOp);
   EXPECT_TRUE(rc.IsOk());
 
   rc = myTree->AssociateNode(myRandomDataOp);
@@ -235,11 +225,7 @@ TEST_F(MindDataTestRandomDataOp, RandomDataOpBasic4) {
   std::shared_ptr<RandomDataOp> myRandomDataOp;
   RandomDataOp::Builder builder;
 
-  rc = builder.SetRowsPerBuffer(2)
-    .SetNumWorkers(1)
-    .SetDataSchema(std::move(testSchema))
-    .SetTotalRows(10)
-    .Build(&myRandomDataOp);
+  rc = builder.SetNumWorkers(1).SetDataSchema(std::move(testSchema)).SetTotalRows(10).Build(&myRandomDataOp);
   EXPECT_TRUE(rc.IsOk());
 
   rc = myTree->AssociateNode(myRandomDataOp);
@@ -315,11 +301,7 @@ TEST_F(MindDataTestRandomDataOp, RandomDataOpBasic5) {
   std::shared_ptr<RandomDataOp> myRandomDataOp;
   RandomDataOp::Builder builder;
 
-  rc = builder.SetRowsPerBuffer(2)
-    .SetNumWorkers(4)
-    .SetDataSchema(std::move(testSchema))
-    .SetTotalRows(10)
-    .Build(&myRandomDataOp);
+  rc = builder.SetNumWorkers(4).SetDataSchema(std::move(testSchema)).SetTotalRows(10).Build(&myRandomDataOp);
   EXPECT_TRUE(rc.IsOk());
 
   rc = myTree->AssociateNode(myRandomDataOp);
@@ -395,11 +377,7 @@ TEST_F(MindDataTestRandomDataOp, RandomDataOpTree1) {
   std::shared_ptr<RandomDataOp> myRandomDataOp;
   RandomDataOp::Builder builder;
 
-  rc = builder.SetRowsPerBuffer(2)
-    .SetNumWorkers(4)
-    .SetDataSchema(std::move(testSchema))
-    .SetTotalRows(10)
-    .Build(&myRandomDataOp);
+  rc = builder.SetNumWorkers(4).SetDataSchema(std::move(testSchema)).SetTotalRows(10).Build(&myRandomDataOp);
   EXPECT_TRUE(rc.IsOk());
 
   rc = myTree->AssociateNode(myRandomDataOp);
@@ -407,9 +385,9 @@ TEST_F(MindDataTestRandomDataOp, RandomDataOpTree1) {
 
   std::shared_ptr<ShuffleOp> myShuffleOp;
   rc = ShuffleOp::Builder()
-      .SetRowsPerBuffer(2)
-      .SetShuffleSize(4)
-      .Build(&myShuffleOp);
+
+         .SetShuffleSize(4)
+         .Build(&myShuffleOp);
   EXPECT_TRUE(rc.IsOk());
   rc = myTree->AssociateNode(myShuffleOp);
   EXPECT_TRUE(rc.IsOk());
diff --git a/tests/ut/cpp/dataset/rename_op_test.cc b/tests/ut/cpp/dataset/rename_op_test.cc
index acb22d4e7b..bd884ff18e 100644
--- a/tests/ut/cpp/dataset/rename_op_test.cc
+++ b/tests/ut/cpp/dataset/rename_op_test.cc
@@ -53,10 +53,10 @@ TEST_F(MindDataTestRenameOp, TestRenameOpDefault) {
   std::string dataset_path = datasets_root_path_ + "/test_tf_file_3_images/train-0000-of-0001.data";
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   rc = TFReaderOp::Builder()
-      .SetDatasetFilesList({dataset_path})
-      .SetRowsPerBuffer(2)
-      .SetWorkerConnectorSize(16)
-      .SetNumWorkers(1)
+         .SetDatasetFilesList({dataset_path})
+
+         .SetWorkerConnectorSize(16)
+         .SetNumWorkers(1)
       .Build(&my_tfreader_op);
   EXPECT_TRUE(rc.IsOk());
   rc = my_tree->AssociateNode(my_tfreader_op);
diff --git a/tests/ut/cpp/dataset/sentence_piece_vocab_op_test.cc b/tests/ut/cpp/dataset/sentence_piece_vocab_op_test.cc
index 6db89eb7b7..f906d5d16e 100644
--- a/tests/ut/cpp/dataset/sentence_piece_vocab_op_test.cc
+++ b/tests/ut/cpp/dataset/sentence_piece_vocab_op_test.cc
@@ -46,7 +46,7 @@ TEST_F(MindDataTestSentencePieceVocabOp, TestSentencePieceFromDatasetFuntions) {
 
   std::shared_ptr<TextFileOp> file_op;
   TextFileOp::Builder builder_file;
-  builder_file.SetTextFilesList({dataset_path}).SetRowsPerBuffer(1).SetNumWorkers(1).SetOpConnectorSize(2);
+  builder_file.SetTextFilesList({dataset_path}).SetNumWorkers(1).SetOpConnectorSize(2);
 
   Status rc = builder_file.Build(&file_op);
   ASSERT_TRUE(rc.IsOk());
@@ -119,7 +119,7 @@ TEST_F(MindDataTestSentencePieceVocabOp, TestSentencePieceTokenizerFuntions) {
 
   std::shared_ptr<TextFileOp> file_op;
   TextFileOp::Builder builder_file;
-  builder_file.SetTextFilesList({dataset_path}).SetRowsPerBuffer(1).SetNumWorkers(1).SetOpConnectorSize(2);
+  builder_file.SetTextFilesList({dataset_path}).SetNumWorkers(1).SetOpConnectorSize(2);
 
   Status rc = builder_file.Build(&file_op);
   ASSERT_TRUE(rc.IsOk());
diff --git a/tests/ut/cpp/dataset/shuffle_op_test.cc b/tests/ut/cpp/dataset/shuffle_op_test.cc
index 6bde46a90e..81515c973f 100644
--- a/tests/ut/cpp/dataset/shuffle_op_test.cc
+++ b/tests/ut/cpp/dataset/shuffle_op_test.cc
@@ -56,16 +56,16 @@ TEST_F(MindDataTestShuffleOp, TestShuffleBasic1) {
   dataset_path = datasets_root_path_ + "/testDataset1/testDataset1.data";
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   rc = TFReaderOp::Builder()
-      .SetDatasetFilesList({dataset_path})
-      .SetRowsPerBuffer(2)
-      .SetWorkerConnectorSize(16)
-      .SetNumWorkers(1)
+         .SetDatasetFilesList({dataset_path})
+
+         .SetWorkerConnectorSize(16)
+         .SetNumWorkers(1)
       .Build(&my_tfreader_op);
   EXPECT_TRUE(rc.IsOk());
   rc = my_tree->AssociateNode(my_tfreader_op);
   EXPECT_TRUE(rc.IsOk());
   std::shared_ptr<ShuffleOp> my_shuffle_op;
-  rc = ShuffleOp::Builder().SetRowsPerBuffer(2).SetShuffleSize(4).Build(&my_shuffle_op);
+  rc = ShuffleOp::Builder().SetShuffleSize(4).Build(&my_shuffle_op);
   EXPECT_TRUE(rc.IsOk());
   rc = my_tree->AssociateNode(my_shuffle_op);
   EXPECT_TRUE(rc.IsOk());
@@ -130,7 +130,6 @@ TEST_F(MindDataTestShuffleOp, TestShuffleBasic2) {
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   rc = TFReaderOp::Builder()
       .SetDatasetFilesList({dataset_path})
-      .SetRowsPerBuffer(3)
       .SetWorkerConnectorSize(16)
       .SetNumWorkers(2)
       .Build(&my_tfreader_op);
@@ -138,7 +137,7 @@ TEST_F(MindDataTestShuffleOp, TestShuffleBasic2) {
   rc = my_tree->AssociateNode(my_tfreader_op);
   EXPECT_TRUE(rc.IsOk());
   std::shared_ptr<ShuffleOp> my_shuffle_op;
-  rc = ShuffleOp::Builder().SetShuffleSize(4).SetShuffleSeed(100).SetRowsPerBuffer(3).Build(&my_shuffle_op);
+  rc = ShuffleOp::Builder().SetShuffleSize(4).SetShuffleSeed(100).Build(&my_shuffle_op);
   EXPECT_TRUE(rc.IsOk());
   rc = my_tree->AssociateNode(my_shuffle_op);
   EXPECT_TRUE(rc.IsOk());
@@ -201,14 +200,13 @@ TEST_F(MindDataTestShuffleOp, TestShuffleBasic3) {
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   rc = TFReaderOp::Builder()
       .SetDatasetFilesList({dataset_path})
-      .SetRowsPerBuffer(3)
       .SetWorkerConnectorSize(16)
       .SetNumWorkers(2)
       .Build(&my_tfreader_op);
   EXPECT_TRUE(rc.IsOk());
   my_tree->AssociateNode(my_tfreader_op);
   std::shared_ptr<ShuffleOp> my_shuffle_op;
-  rc = ShuffleOp::Builder().SetShuffleSize(100).SetRowsPerBuffer(3).Build(&my_shuffle_op);
+  rc = ShuffleOp::Builder().SetShuffleSize(100).Build(&my_shuffle_op);
   EXPECT_TRUE(rc.IsOk());
   rc = my_tree->AssociateNode(my_shuffle_op);
   EXPECT_TRUE(rc.IsOk());
@@ -275,7 +273,6 @@ TEST_F(MindDataTestShuffleOp, TestRepeatShuffle) {
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   rc = TFReaderOp::Builder()
       .SetDatasetFilesList({dataset_path})
-      .SetRowsPerBuffer(3)
       .SetWorkerConnectorSize(16)
       .SetNumWorkers(2)
       .Build(&my_tfreader_op);
@@ -286,7 +283,6 @@ TEST_F(MindDataTestShuffleOp, TestRepeatShuffle) {
   rc = ShuffleOp::Builder()
       .SetShuffleSize(4)
       .SetShuffleSeed(100)
-      .SetRowsPerBuffer(3)
       .SetReshuffleEachEpoch(true)
       .Build(&my_shuffle_op);
   EXPECT_TRUE(rc.IsOk());
diff --git a/tests/ut/cpp/dataset/skip_op_test.cc b/tests/ut/cpp/dataset/skip_op_test.cc
index e5a9811c52..40ee70905a 100644
--- a/tests/ut/cpp/dataset/skip_op_test.cc
+++ b/tests/ut/cpp/dataset/skip_op_test.cc
@@ -35,7 +35,7 @@ TEST_F(MindDataTestSkipOp, TestSkipOpFuntions) {
 
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   TFReaderOp::Builder builder;
-  builder.SetDatasetFilesList({dataset_path}).SetRowsPerBuffer(16).SetWorkerConnectorSize(16);
+  builder.SetDatasetFilesList({dataset_path}).SetWorkerConnectorSize(16);
   std::unique_ptr<DataSchema> schema = std::make_unique<DataSchema>();
   schema->LoadSchemaFile(datasets_root_path_ + "/testTFTestAllTypes/datasetSchema.json", {});
   builder.SetDataSchema(std::move(schema));
diff --git a/tests/ut/cpp/dataset/take_op_test.cc b/tests/ut/cpp/dataset/take_op_test.cc
index 9b49c39201..ea78cdb02b 100644
--- a/tests/ut/cpp/dataset/take_op_test.cc
+++ b/tests/ut/cpp/dataset/take_op_test.cc
@@ -42,7 +42,7 @@ TEST_F(MindDataTestTakeOp, TestTakeProject) {
   // TFReaderOp
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   TFReaderOp::Builder builder;
-  builder.SetDatasetFilesList({dataset_path}).SetRowsPerBuffer(16).SetWorkerConnectorSize(16);
+  builder.SetDatasetFilesList({dataset_path}).SetWorkerConnectorSize(16);
   std::unique_ptr<DataSchema> schema = std::make_unique<DataSchema>();
   schema->LoadSchemaFile(datasets_root_path_ + "/testTFTestAllTypes/datasetSchema.json", {});
   builder.SetDataSchema(std::move(schema));
diff --git a/tests/ut/cpp/dataset/text_file_op_test.cc b/tests/ut/cpp/dataset/text_file_op_test.cc
index 09cd1b770f..f8b79a6bb7 100644
--- a/tests/ut/cpp/dataset/text_file_op_test.cc
+++ b/tests/ut/cpp/dataset/text_file_op_test.cc
@@ -45,7 +45,7 @@ TEST_F(MindDataTestTextFileOp, TestTextFileBasic) {
 
   std::shared_ptr<TextFileOp> op;
   TextFileOp::Builder builder;
-  builder.SetTextFilesList({dataset_path}).SetRowsPerBuffer(16).SetOpConnectorSize(2);
+  builder.SetTextFilesList({dataset_path}).SetOpConnectorSize(2);
 
   Status rc = builder.Build(&op);
   ASSERT_TRUE(rc.IsOk());
@@ -94,7 +94,7 @@ TEST_F(MindDataTestTextFileOp, TestTextFileFileNotExist) {
 
   std::shared_ptr<TextFileOp> op;
   TextFileOp::Builder builder;
-  builder.SetTextFilesList({dataset_path}).SetRowsPerBuffer(16).SetOpConnectorSize(2);
+  builder.SetTextFilesList({dataset_path}).SetOpConnectorSize(2);
 
   Status rc = builder.Build(&op);
   ASSERT_TRUE(rc.IsOk());
diff --git a/tests/ut/cpp/dataset/tfReader_op_test.cc b/tests/ut/cpp/dataset/tfReader_op_test.cc
index 4422a81728..546fffdd28 100644
--- a/tests/ut/cpp/dataset/tfReader_op_test.cc
+++ b/tests/ut/cpp/dataset/tfReader_op_test.cc
@@ -44,7 +44,7 @@ TEST_F(MindDataTestTFReaderOp, TestTFReaderBasic1) {
 
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   TFReaderOp::Builder builder;
-  builder.SetDatasetFilesList({dataset_path}).SetRowsPerBuffer(16);
+  builder.SetDatasetFilesList({dataset_path});
   std::unique_ptr<DataSchema> schema = std::make_unique<DataSchema>();
   schema->LoadSchemaFile(datasets_root_path_ + "/testTFTestAllTypes/datasetSchema.json", {});
   builder.SetDataSchema(std::move(schema));
@@ -148,7 +148,7 @@ TEST_F(MindDataTestTFReaderOp, TestTFReaderSmallRowsPerBuffer) {
 
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   TFReaderOp::Builder builder;
-  builder.SetDatasetFilesList({dataset_path}).SetRowsPerBuffer(1);
+  builder.SetDatasetFilesList({dataset_path});
   std::unique_ptr<DataSchema> schema = std::make_unique<DataSchema>();
   schema->LoadSchemaFile(datasets_root_path_ + "/testTFTestAllTypes/datasetSchema.json", {});
   builder.SetDataSchema(std::move(schema));
@@ -200,7 +200,7 @@ TEST_F(MindDataTestTFReaderOp, TestTFReaderLargeQueueSize) {
 
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   TFReaderOp::Builder builder;
-  builder.SetDatasetFilesList({dataset_path}).SetWorkerConnectorSize(1).SetRowsPerBuffer(16);
+  builder.SetDatasetFilesList({dataset_path}).SetWorkerConnectorSize(1);
   std::unique_ptr<DataSchema> schema = std::make_unique<DataSchema>();
   schema->LoadSchemaFile(datasets_root_path_ + "/testTFTestAllTypes/datasetSchema.json", {});
   builder.SetDataSchema(std::move(schema));
@@ -252,10 +252,11 @@ TEST_F(MindDataTestTFReaderOp, TestTFReaderOneThread) {
 
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   TFReaderOp::Builder builder;
-  builder.SetDatasetFilesList({dataset_path})
-      .SetRowsPerBuffer(16)
-      .SetNumWorkers(1);
-   std::unique_ptr<DataSchema> schema = std::make_unique<DataSchema>();
+  builder
+    .SetDatasetFilesList({dataset_path})
+
+    .SetNumWorkers(1);
+  std::unique_ptr<DataSchema> schema = std::make_unique<DataSchema>();
   schema->LoadSchemaFile(datasets_root_path_ + "/testTFTestAllTypes/datasetSchema.json", {});
   builder.SetDataSchema(std::move(schema));
   Status rc = builder.Build(&my_tfreader_op);
@@ -307,7 +308,7 @@ TEST_F(MindDataTestTFReaderOp, TestTFReaderRepeat) {
   // TFReaderOp
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   TFReaderOp::Builder builder;
-  builder.SetDatasetFilesList({dataset_path}).SetRowsPerBuffer(16).SetWorkerConnectorSize(16);
+  builder.SetDatasetFilesList({dataset_path}).SetWorkerConnectorSize(16);
   std::unique_ptr<DataSchema> schema = std::make_unique<DataSchema>();
   schema->LoadSchemaFile(datasets_root_path_ + "/testTFTestAllTypes/datasetSchema.json", {});
   builder.SetDataSchema(std::move(schema));
@@ -378,7 +379,7 @@ TEST_F(MindDataTestTFReaderOp, TestTFReaderSchemaConstructor) {
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   TFReaderOp::Builder builder;
   builder.SetDatasetFilesList({dataset_path + "/test.data"})
-    .SetRowsPerBuffer(16)
+
     .SetNumWorkers(16)
     .SetDataSchema(std::move(data_schema));
   Status rc = builder.Build(&my_tfreader_op);
@@ -605,7 +606,7 @@ TEST_F(MindDataTestTFReaderOp, TestTFReaderBasicNoSchema) {
 
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   TFReaderOp::Builder builder;
-  builder.SetDatasetFilesList({dataset_path}).SetRowsPerBuffer(16);
+  builder.SetDatasetFilesList({dataset_path});
   Status rc = builder.Build(&my_tfreader_op);
   ASSERT_TRUE(rc.IsOk());
 
@@ -697,7 +698,7 @@ TEST_F(MindDataTestTFReaderOp, TestTFReaderInvalidFiles) {
 
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   TFReaderOp::Builder builder;
-  builder.SetDatasetFilesList({invalid_file, valid_file, schema_file}).SetRowsPerBuffer(16);
+  builder.SetDatasetFilesList({invalid_file, valid_file, schema_file});
 
   std::unique_ptr<DataSchema> schema = std::make_unique<DataSchema>();
   schema->LoadSchemaFile(schema_file, {});
@@ -706,7 +707,7 @@ TEST_F(MindDataTestTFReaderOp, TestTFReaderInvalidFiles) {
   Status rc = builder.Build(&my_tfreader_op);
   ASSERT_TRUE(!rc.IsOk());
 
-  builder.SetDatasetFilesList({invalid_file, valid_file, schema_file, nonexistent_file}).SetRowsPerBuffer(16);
+  builder.SetDatasetFilesList({invalid_file, valid_file, schema_file, nonexistent_file});
 
   schema = std::make_unique<DataSchema>();
   schema->LoadSchemaFile(schema_file, {});
diff --git a/tests/ut/cpp/dataset/voc_op_test.cc b/tests/ut/cpp/dataset/voc_op_test.cc
index 2bafbddf6d..ef004b93ad 100644
--- a/tests/ut/cpp/dataset/voc_op_test.cc
+++ b/tests/ut/cpp/dataset/voc_op_test.cc
@@ -39,11 +39,11 @@
 namespace common = mindspore::common;
 
 using namespace mindspore::dataset;
-using mindspore::MsLogLevel::ERROR;
-using mindspore::ExceptionType::NoExceptionType;
 using mindspore::LogStream;
+using mindspore::ExceptionType::NoExceptionType;
+using mindspore::MsLogLevel::ERROR;
 
-std::shared_ptr<BatchOp> Batch(int batch_size = 1, bool drop = false, int rows_per_buf = 2);
+std::shared_ptr<BatchOp> Batch(int batch_size = 1, bool drop = false);
 
 std::shared_ptr<ExecutionTree> Build(std::vector<std::shared_ptr<DatasetOp>> ops);
 
@@ -61,8 +61,7 @@ TEST_F(MindDataTestVOCOp, TestVOCDetection) {
   std::string task_mode("train");
   std::shared_ptr<VOCOp> my_voc_op;
   VOCOp::Builder builder;
-  Status rc = builder.SetDir(dataset_path).SetTask(task_type).SetUsage(task_mode)
-                     .Build(&my_voc_op);
+  Status rc = builder.SetDir(dataset_path).SetTask(task_type).SetUsage(task_mode).Build(&my_voc_op);
   ASSERT_TRUE(rc.IsOk());
 
   rc = my_tree->AssociateNode(my_voc_op);
@@ -87,7 +86,7 @@ TEST_F(MindDataTestVOCOp, TestVOCDetection) {
   while (!tensor_list.empty()) {
     MS_LOG(DEBUG) << "Row display for row #: " << row_count << ".";
 
-    //Display the tensor by calling the printer on it
+    // Display the tensor by calling the printer on it
     for (int i = 0; i < tensor_list.size(); i++) {
       std::ostringstream ss;
       ss << "(" << tensor_list[i] << "): " << *tensor_list[i] << std::endl;
@@ -112,8 +111,7 @@ TEST_F(MindDataTestVOCOp, TestVOCSegmentation) {
   std::string task_mode("train");
   std::shared_ptr<VOCOp> my_voc_op;
   VOCOp::Builder builder;
-  Status rc = builder.SetDir(dataset_path).SetTask(task_type).SetUsage(task_mode)
-                     .Build(&my_voc_op);
+  Status rc = builder.SetDir(dataset_path).SetTask(task_type).SetUsage(task_mode).Build(&my_voc_op);
   ASSERT_TRUE(rc.IsOk());
 
   rc = my_tree->AssociateNode(my_voc_op);
@@ -138,7 +136,7 @@ TEST_F(MindDataTestVOCOp, TestVOCSegmentation) {
   while (!tensor_list.empty()) {
     MS_LOG(DEBUG) << "Row display for row #: " << row_count << ".";
 
-    //Display the tensor by calling the printer on it
+    // Display the tensor by calling the printer on it
     for (int i = 0; i < tensor_list.size(); i++) {
       std::ostringstream ss;
       ss << "(" << tensor_list[i] << "): " << *tensor_list[i] << std::endl;
@@ -168,9 +166,7 @@ TEST_F(MindDataTestVOCOp, TestVOCClassIndex) {
   std::shared_ptr<VOCOp> my_voc_op;
   VOCOp::Builder builder;
   Status rc =
-    builder.SetDir(dataset_path).SetTask(task_type).SetUsage(task_mode)
-                     .SetClassIndex(class_index)
-                     .Build(&my_voc_op);
+    builder.SetDir(dataset_path).SetTask(task_type).SetUsage(task_mode).SetClassIndex(class_index).Build(&my_voc_op);
   ASSERT_TRUE(rc.IsOk());
 
   rc = my_tree->AssociateNode(my_voc_op);
@@ -195,7 +191,7 @@ TEST_F(MindDataTestVOCOp, TestVOCClassIndex) {
   while (!tensor_list.empty()) {
     MS_LOG(DEBUG) << "Row display for row #: " << row_count << ".";
 
-    //Display the tensor by calling the printer on it
+    // Display the tensor by calling the printer on it
     for (int i = 0; i < tensor_list.size(); i++) {
       std::ostringstream ss;
       ss << "(" << tensor_list[i] << "): " << *tensor_list[i] << std::endl;
diff --git a/tests/ut/cpp/dataset/zip_op_test.cc b/tests/ut/cpp/dataset/zip_op_test.cc
index 4a7d34374d..858c6d8179 100644
--- a/tests/ut/cpp/dataset/zip_op_test.cc
+++ b/tests/ut/cpp/dataset/zip_op_test.cc
@@ -36,22 +36,21 @@
 namespace common = mindspore::common;
 
 using namespace mindspore::dataset;
-using mindspore::MsLogLevel::INFO;
-using mindspore::ExceptionType::NoExceptionType;
 using mindspore::LogStream;
+using mindspore::ExceptionType::NoExceptionType;
+using mindspore::MsLogLevel::INFO;
 
-class MindDataTestZipOp : public UT::DatasetOpTesting {
- };
+class MindDataTestZipOp : public UT::DatasetOpTesting {};
 
 TEST_F(MindDataTestZipOp, MindDataTestZipOpDefault) {
-/* Tree:
- *
- *
- *                  OpId(2) ZipOp
- *            /                       \
- *     OpId(0) TFReaderOp    OpId(1) TFReaderOp
- * Start with an empty execution tree
-*/
+  /* Tree:
+   *
+   *
+   *                  OpId(2) ZipOp
+   *            /                       \
+   *     OpId(0) TFReaderOp    OpId(1) TFReaderOp
+   * Start with an empty execution tree
+   */
   Status rc;
   MS_LOG(INFO) << "UT test TestZipBasic.";
   auto my_tree = std::make_shared<ExecutionTree>();
@@ -61,21 +60,19 @@ TEST_F(MindDataTestZipOp, MindDataTestZipOpDefault) {
   std::string dataset_path2 = datasets_root_path_ + "/testBatchDataset/test.data";
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   rc = TFReaderOp::Builder()
-      .SetDatasetFilesList({dataset_path})
-      .SetRowsPerBuffer(2)
-      .SetWorkerConnectorSize(16)
-      .SetNumWorkers(1)
-      .Build(&my_tfreader_op);
+         .SetDatasetFilesList({dataset_path})
+         .SetWorkerConnectorSize(16)
+         .SetNumWorkers(1)
+         .Build(&my_tfreader_op);
   EXPECT_TRUE(rc.IsOk());
   rc = my_tree->AssociateNode(my_tfreader_op);
   EXPECT_TRUE(rc.IsOk());
   std::shared_ptr<TFReaderOp> my_tfreader_op2;
   rc = TFReaderOp::Builder()
-      .SetDatasetFilesList({dataset_path2})
-      .SetRowsPerBuffer(2)
-      .SetWorkerConnectorSize(1)
-      .SetNumWorkers(1)
-      .Build(&my_tfreader_op2);
+         .SetDatasetFilesList({dataset_path2})
+         .SetWorkerConnectorSize(1)
+         .SetNumWorkers(1)
+         .Build(&my_tfreader_op2);
   EXPECT_TRUE(rc.IsOk());
   rc = my_tree->AssociateNode(my_tfreader_op2);
   EXPECT_TRUE(rc.IsOk());
@@ -123,20 +120,19 @@ TEST_F(MindDataTestZipOp, MindDataTestZipOpDefault) {
     EXPECT_TRUE(rc.IsOk());
     row_count++;
   }
-  ASSERT_EQ(row_count, 3); // Should be 3 rows fetched
+  ASSERT_EQ(row_count, 3);  // Should be 3 rows fetched
 }
 
-
 TEST_F(MindDataTestZipOp, MindDataTestZipOpRepeat) {
-/* Tree:
- *                  OpId(3) Repeat(3)
- *
- *                  OpId(2) ZipOp
- *            /                       \
- *         OpId(0) TFReaderOp    OpId(1) TFReaderOp
- *
- * Start with an empty execution tree
-*/
+  /* Tree:
+   *                  OpId(3) Repeat(3)
+   *
+   *                  OpId(2) ZipOp
+   *            /                       \
+   *         OpId(0) TFReaderOp    OpId(1) TFReaderOp
+   *
+   * Start with an empty execution tree
+   */
   Status rc;
   MS_LOG(INFO) << "UT test TestZipRepeat.";
   auto my_tree = std::make_shared<ExecutionTree>();
@@ -146,21 +142,21 @@ TEST_F(MindDataTestZipOp, MindDataTestZipOpRepeat) {
   std::string dataset_path2 = datasets_root_path_ + "/testBatchDataset/test.data";
   std::shared_ptr<TFReaderOp> my_tfreader_op;
   rc = TFReaderOp::Builder()
-      .SetDatasetFilesList({dataset_path})
-      .SetRowsPerBuffer(2)
-      .SetWorkerConnectorSize(16)
-      .SetNumWorkers(1)
-      .Build(&my_tfreader_op);
+         .SetDatasetFilesList({dataset_path})
+
+         .SetWorkerConnectorSize(16)
+         .SetNumWorkers(1)
+         .Build(&my_tfreader_op);
   EXPECT_TRUE(rc.IsOk());
   rc = my_tree->AssociateNode(my_tfreader_op);
   EXPECT_TRUE(rc.IsOk());
   std::shared_ptr<TFReaderOp> my_tfreader_op2;
   rc = TFReaderOp::Builder()
-      .SetDatasetFilesList({dataset_path2})
-      .SetRowsPerBuffer(2)
-      .SetWorkerConnectorSize(1)
-      .SetNumWorkers(1)
-      .Build(&my_tfreader_op2);
+         .SetDatasetFilesList({dataset_path2})
+
+         .SetWorkerConnectorSize(1)
+         .SetNumWorkers(1)
+         .Build(&my_tfreader_op2);
   EXPECT_TRUE(rc.IsOk());
   rc = my_tree->AssociateNode(my_tfreader_op2);
   EXPECT_TRUE(rc.IsOk());
@@ -221,5 +217,5 @@ TEST_F(MindDataTestZipOp, MindDataTestZipOpRepeat) {
     EXPECT_TRUE(rc.IsOk());
     row_count++;
   }
-  ASSERT_EQ(row_count, 9); // Should be 9 rows fetched
+  ASSERT_EQ(row_count, 9);  // Should be 9 rows fetched
 }
diff --git a/tests/ut/python/dataset/test_config.py b/tests/ut/python/dataset/test_config.py
index 41f0035201..fdeab39e3b 100644
--- a/tests/ut/python/dataset/test_config.py
+++ b/tests/ut/python/dataset/test_config.py
@@ -43,21 +43,18 @@ def test_basic():
 
     ds.config.load('../data/dataset/declient.cfg')
 
-    # assert ds.config.get_rows_per_buffer() == 32
     assert ds.config.get_num_parallel_workers() == 8
     # assert ds.config.get_worker_connector_size() == 16
     assert ds.config.get_prefetch_size() == 16
     assert ds.config.get_seed() == 5489
     assert ds.config.get_monitor_sampling_interval() == 15
 
-    # ds.config.set_rows_per_buffer(1)
     ds.config.set_num_parallel_workers(2)
     # ds.config.set_worker_connector_size(3)
     ds.config.set_prefetch_size(4)
     ds.config.set_seed(5)
     ds.config.set_monitor_sampling_interval(45)
 
-    # assert ds.config.get_rows_per_buffer() == 1
     assert ds.config.get_num_parallel_workers() == 2
     # assert ds.config.get_worker_connector_size() == 3
     assert ds.config.get_prefetch_size() == 4