word2vec demo support sparse remote update

demo/word2vec/api_train_v2.py

@@ -2,26 +2,38 @@ import math
 
 import paddle.v2 as paddle
 
-dictsize = 1953
 embsize = 32
 hiddensize = 256
 N = 5
 
 
 def wordemb(inlayer):
-    wordemb = paddle.layer.table_projection(
+    wordemb = paddle.layer.embedding(
         input=inlayer,
         size=embsize,
         param_attr=paddle.attr.Param(
             name="_proj",
             initial_std=0.001,
             learning_rate=1,
-            l2_rate=0, ))
+            l2_rate=0,
+            sparse_update=True))
     return wordemb
 
 
 def main():
+    # for local training
+    cluster_train = False
+
+    if not cluster_train:
         paddle.init(use_gpu=False, trainer_count=1)
+    else:
+        paddle.init(
+            use_gpu=False,
+            trainer_count=1,
+            port=7164,
+            ports_num=1,
+            ports_num_for_sparse=1,
+            num_gradient_servers=1)
     word_dict = paddle.dataset.imikolov.build_dict()
     dict_size = len(word_dict)
     firstword = paddle.layer.data(
@@ -65,11 +77,15 @@ def main():
                     result.metrics)
 
     cost = paddle.layer.classification_cost(input=predictword, label=nextword)
+
     parameters = paddle.parameters.create(cost)
-    adam_optimizer = paddle.optimizer.Adam(
+    adagrad = paddle.optimizer.AdaGrad(
         learning_rate=3e-3,
         regularization=paddle.optimizer.L2Regularization(8e-4))
-    trainer = paddle.trainer.SGD(cost, parameters, adam_optimizer)
+    trainer = paddle.trainer.SGD(cost,
+                                 parameters,
+                                 adagrad,
+                                 is_local=not cluster_train)
     trainer.train(
         paddle.batch(paddle.dataset.imikolov.train(word_dict, N), 32),
         num_passes=30,

paddle/api/PaddleAPI.h

@@ -821,7 +821,7 @@ public:
   static ParameterUpdater* createLocalUpdater(OptimizationConfig* config);
   static ParameterUpdater* createRemoteUpdater(OptimizationConfig* config,
                                                int passCount,
-                                               bool userSparseUpdater);
+                                               bool useSparseUpdater);
   ~ParameterUpdater();
 
   /**

paddle/api/ParameterUpdater.cpp

@@ -29,11 +29,11 @@ ParameterUpdater *ParameterUpdater::createLocalUpdater(
 }
 
 ParameterUpdater *ParameterUpdater::createRemoteUpdater(
-    OptimizationConfig *config, int passCount, bool userSparseUpdater) {
+    OptimizationConfig *config, int passCount, bool useSparseUpdater) {
   auto updater = new ParameterUpdater();
   auto remoteUpdater = new paddle::RemoteParameterUpdater(
       config->m->getConfig(), passCount, nullptr);
-  if (userSparseUpdater) {
+  if (useSparseUpdater) {
     std::unique_ptr<paddle::ParameterUpdater> remoteUpdaterPtr;
     remoteUpdaterPtr.reset(remoteUpdater);
     auto sparseRemoteUpdater =