diff --git a/cmake/external/pslib.cmake b/cmake/external/pslib.cmake
index 0287e5cf2a835ed65c5fc26ff69d2653d5db217e..b7159d14c11f0ad2e9cb5c5617f6065f57849642 100644
--- a/cmake/external/pslib.cmake
+++ b/cmake/external/pslib.cmake
@@ -29,9 +29,9 @@ INCLUDE(ExternalProject)
 SET(PSLIB_PROJECT       "extern_pslib")
 IF((NOT DEFINED PSLIB_VER) OR (NOT DEFINED PSLIB_URL))
   MESSAGE(STATUS "use pre defined download url")
-  SET(PSLIB_VER "0.1.0" CACHE STRING "" FORCE) 
-  SET(PSLIB_NAME "pslib" CACHE STRING "" FORCE) 
-  SET(PSLIB_URL "https://raw.githubusercontent.com/PaddlePaddle/Fleet/release/${PSLIB_VER}/${PSLIB_NAME}.tar.gz" CACHE STRING "" FORCE) 
+  SET(PSLIB_VER "0.1.1" CACHE STRING "" FORCE)
+  SET(PSLIB_NAME "pslib" CACHE STRING "" FORCE)
+  SET(PSLIB_URL "https://raw.githubusercontent.com/PaddlePaddle/Fleet/release/${PSLIB_VER}/ps/${PSLIB_NAME}.tar.gz" CACHE STRING "" FORCE)
 ENDIF()
 MESSAGE(STATUS "PSLIB_NAME: ${PSLIB_NAME}, PSLIB_URL: ${PSLIB_URL}")
 SET(PSLIB_SOURCE_DIR    "${THIRD_PARTY_PATH}/pslib")
diff --git a/paddle/fluid/framework/blocking_queue.h b/paddle/fluid/framework/blocking_queue.h
index cc5b4e8c4b8e114668f472ea2af9de96835720d0..4f35da402f3ec2b0616c29085d01e8b7f3d0d472 100644
--- a/paddle/fluid/framework/blocking_queue.h
+++ b/paddle/fluid/framework/blocking_queue.h
@@ -95,6 +95,11 @@ class BlockingQueue {
     return q_.size();
   }
 
+  void Clear() {
+    std::lock_guard<std::mutex> lock(mutex_);
+    std::deque<T>().swap(q_);
+  }
+
  private:
   std::mutex mutex_;
   std::condition_variable cv_;
diff --git a/paddle/fluid/framework/data_feed.cc b/paddle/fluid/framework/data_feed.cc
index 02e467e853e9c3e7a4d581043e6a8f7b70519521..bdefb1df8cedd681482b7c46a4a6e40f35007633 100644
--- a/paddle/fluid/framework/data_feed.cc
+++ b/paddle/fluid/framework/data_feed.cc
@@ -158,6 +158,7 @@ InMemoryDataFeed<T>::InMemoryDataFeed() {
   mutex_for_update_memory_data_ = nullptr;
   this->file_idx_ = nullptr;
   this->mutex_for_pick_file_ = nullptr;
+  fleet_send_sleep_seconds_ = 2;
 }
 
 template <typename T>
@@ -366,7 +367,7 @@ void InMemoryDataFeed<T>::GlobalShuffle() {
   auto fleet_ptr = FleetWrapper::GetInstance();
   std::vector<std::vector<T*>> send_vec(trainer_num_);
   std::vector<int> send_index(trainer_num_);
-  uint64_t reserve_len = fleet_send_batch_size_ / trainer_num_;
+  uint64_t reserve_len = fleet_send_batch_size_ / trainer_num_ + 1;
   for (auto& vec : send_vec) {
     vec.reserve(reserve_len);
   }
@@ -377,46 +378,33 @@ void InMemoryDataFeed<T>::GlobalShuffle() {
   auto interval = GetMemoryDataInterval();
   VLOG(3) << "global shuffle data from  [" << interval.first << ", "
           << interval.second << "), thread_id=" << thread_id_;
-  for (int64_t i = interval.first; i < interval.second; ++i) {
-    // if get ins id, can also use hash
-    // std::string ins_id = memory_data_[i].ins_id;
-    int64_t random_num = rand_r(&rand_seed);
-    int64_t node_id = random_num % trainer_num_;
-    send_vec[node_id].push_back(&((*memory_data_)[i]));
-    if (i % fleet_send_batch_size_ == 0 && i != 0) {
-      // shuffle the sequence of sending to avoid network timeout error
-      std::random_shuffle(send_index.begin(), send_index.end());
-      for (int index = 0; index < send_index.size(); ++index) {
-        int j = send_index[index];
-        std::string send_str;
-        SerializeIns(send_vec[j], &send_str);
-        VLOG(3) << "send str_length=" << send_str.length()
-                << ", ins num=" << send_vec[j].size() << " to node_id=" << j
-                << ", thread_id=" << thread_id_;
-        auto ret = fleet_ptr->SendClientToClientMsg(0, j, send_str);
-        VLOG(3) << "end send, thread_id=" << thread_id_;
-        send_vec[j].clear();
-        total_status.push_back(std::move(ret));
-      }
+
+  for (int64_t i = interval.first; i < interval.second;
+       i += fleet_send_batch_size_) {
+    for (int64_t j = 0; j < fleet_send_batch_size_ && i + j < interval.second;
+         ++j) {
+      int64_t random_num = fleet_ptr->LocalRandomEngine()();
+      int64_t node_id = random_num % trainer_num_;
+      send_vec[node_id].push_back(&((*memory_data_)[i + j]));
     }
-  }
-  // shuffle the sequence of sending to avoid network timeout error
-  std::random_shuffle(send_index.begin(), send_index.end());
-  for (int index = 0; index < send_index.size(); ++index) {
-    int j = send_index[index];
-    if (send_vec[j].size() != 0) {
+    total_status.clear();
+    std::shuffle(send_index.begin(), send_index.end(),
+                 fleet_ptr->LocalRandomEngine());
+    for (int index = 0; index < send_index.size(); ++index) {
+      int j = send_index[index];
+      if (send_vec[j].size() == 0) {
+        continue;
+      }
       std::string send_str;
       SerializeIns(send_vec[j], &send_str);
-      VLOG(3) << "send str_length=" << send_str.length() << " to node_id=" << j
-              << ", thread_id=" << thread_id_;
       auto ret = fleet_ptr->SendClientToClientMsg(0, j, send_str);
-      VLOG(3) << "end send, thread_id=" << thread_id_;
       total_status.push_back(std::move(ret));
+      send_vec[j].clear();
     }
-    std::vector<T*>().swap(send_vec[j]);
-  }
-  for (auto& t : total_status) {
-    t.wait();
+    for (auto& t : total_status) {
+      t.wait();
+    }
+    sleep(fleet_send_sleep_seconds_);
   }
   VLOG(3) << "GlobalShuffle() end, thread_id=" << thread_id_;
 #endif
@@ -436,6 +424,24 @@ std::pair<int64_t, int64_t> InMemoryDataFeed<T>::GetMemoryDataInterval() {
   return std::make_pair(start, end);
 }
 
+template <typename T>
+int64_t InMemoryDataFeed<T>::GetChannelDataSize() {
+  if (cur_channel_ == 0) {
+    return shuffled_ins_->Size();
+  } else {
+    return shuffled_ins_out_->Size();
+  }
+}
+
+template <typename T>
+void InMemoryDataFeed<T>::ReleaseChannelData() {
+  if (cur_channel_ == 0) {
+    shuffled_ins_->Clear();
+  } else {
+    shuffled_ins_out_->Clear();
+  }
+}
+
 // explicit instantiation
 template class InMemoryDataFeed<std::vector<MultiSlotType>>;
 
diff --git a/paddle/fluid/framework/data_feed.h b/paddle/fluid/framework/data_feed.h
index c141059a6d6b3420f02c1b6090cf67db7b7b4da8..594ba3cbcc4b1aa1069478f75aa20221cd2411a9 100644
--- a/paddle/fluid/framework/data_feed.h
+++ b/paddle/fluid/framework/data_feed.h
@@ -115,6 +115,9 @@ class DataFeed {
   virtual void FillChannelToMemoryData() {}
   // This function will do nothing at default
   virtual void PutInsToChannel(const std::string& ins_str) {}
+  virtual int64_t GetChannelDataSize() { return 0; }
+  // This function will do nothing at default
+  virtual void ReleaseChannelData() {}
 
  protected:
   // The following three functions are used to check if it is executed in this
@@ -224,6 +227,8 @@ class InMemoryDataFeed : public PrivateQueueDataFeed<T> {
   virtual void LoadIntoMemory();
   virtual void LocalShuffle();
   virtual void GlobalShuffle();
+  virtual int64_t GetChannelDataSize();
+  virtual void ReleaseChannelData();
 
  protected:
   virtual void AddInstanceToInsVec(T* vec_ins, const T& instance,
@@ -248,6 +253,9 @@ class InMemoryDataFeed : public PrivateQueueDataFeed<T> {
   std::shared_ptr<paddle::framework::BlockingQueue<T>> shuffled_ins_;
   std::shared_ptr<paddle::framework::BlockingQueue<T>> shuffled_ins_out_;
   int64_t fleet_send_batch_size_;
+  // sleep after send is to slow down sending data, but it's trick,
+  // should be removed later.
+  int64_t fleet_send_sleep_seconds_;
 };
 
 // This class define the data type of instance(ins_vec) in MultiSlotDataFeed
diff --git a/paddle/fluid/framework/data_set.cc b/paddle/fluid/framework/data_set.cc
index a3b7b1e454ecec9da766b9b156c31b1317bb9d35..1b3edeed10352c6abc7cfadadbe16c1aa4e32078 100644
--- a/paddle/fluid/framework/data_set.cc
+++ b/paddle/fluid/framework/data_set.cc
@@ -141,6 +141,9 @@ template <typename T>
 void DatasetImpl<T>::ReleaseMemory() {
   VLOG(3) << "DatasetImpl<T>::ReleaseMemory() begin";
   std::vector<T>().swap(memory_data_);
+  for (int i = 0; i < readers_.size(); ++i) {
+    readers_[i]->ReleaseChannelData();
+  }
   VLOG(3) << "DatasetImpl<T>::ReleaseMemory() end";
 }
 
@@ -178,8 +181,10 @@ void DatasetImpl<T>::GlobalShuffle() {
   if (readers_.size() == 0) {
     CreateReaders();
   }
-  // if it is not InMemory, memory_data_ is empty
-  std::random_shuffle(memory_data_.begin(), memory_data_.end());
+  auto fleet_ptr = FleetWrapper::GetInstance();
+  // local shuffle all data before global shuffle
+  std::shuffle(memory_data_.begin(), memory_data_.end(),
+               fleet_ptr->LocalRandomEngine());
   VLOG(3) << "start global shuffle threads";
   std::vector<std::thread> global_shuffle_threads;
   for (int i = 0; i < thread_num_; ++i) {
@@ -260,6 +265,20 @@ void DatasetImpl<T>::DestroyReaders() {
   }
 }
 
+template <typename T>
+int64_t DatasetImpl<T>::GetMemoryDataSize() {
+  return memory_data_.size();
+}
+
+template <typename T>
+int64_t DatasetImpl<T>::GetShuffleDataSize() {
+  int64_t sum = 0;
+  for (int i = 0; i < readers_.size(); ++i) {
+    sum += readers_[i]->GetChannelDataSize();
+  }
+  return sum;
+}
+
 template <typename T>
 int DatasetImpl<T>::ReceiveFromClient(int msg_type, int client_id,
                                       const std::string& msg) {
@@ -267,7 +286,7 @@ int DatasetImpl<T>::ReceiveFromClient(int msg_type, int client_id,
   VLOG(3) << "ReceiveFromClient msg_type=" << msg_type
           << ", client_id=" << client_id << ", msg length=" << msg.length();
   auto fleet_ptr = FleetWrapper::GetInstance();
-  int64_t index = rand_r(&rand_seed) % thread_num_;
+  int64_t index = fleet_ptr->LocalRandomEngine()() % thread_num_;
   VLOG(3) << "ramdom index=" << index;
   readers_[index]->PutInsToChannel(msg);
 #endif
diff --git a/paddle/fluid/framework/data_set.h b/paddle/fluid/framework/data_set.h
index bbe0f937abfa635b126062059abfcfb70adb996e..ffbc7bfd95b2bada56b0d6280d05bf678645fb1c 100644
--- a/paddle/fluid/framework/data_set.h
+++ b/paddle/fluid/framework/data_set.h
@@ -85,6 +85,10 @@ class Dataset {
   virtual void CreateReaders() = 0;
   // destroy readers
   virtual void DestroyReaders() = 0;
+  // get memory data size
+  virtual int64_t GetMemoryDataSize() = 0;
+  // get shuffle data size
+  virtual int64_t GetShuffleDataSize() = 0;
 
  protected:
   virtual int ReceiveFromClient(int msg_type, int client_id,
@@ -127,6 +131,8 @@ class DatasetImpl : public Dataset {
   virtual void GlobalShuffle();
   virtual void CreateReaders();
   virtual void DestroyReaders();
+  virtual int64_t GetMemoryDataSize();
+  virtual int64_t GetShuffleDataSize();
 
  protected:
   virtual int ReceiveFromClient(int msg_type, int client_id,
diff --git a/paddle/fluid/framework/device_worker.h b/paddle/fluid/framework/device_worker.h
index a7a8663ec3b1c436104f53b6db833bd26f6722f0..7f89d05fe070571a9b33b9cfc9bfdc9c5ef32f86 100644
--- a/paddle/fluid/framework/device_worker.h
+++ b/paddle/fluid/framework/device_worker.h
@@ -48,6 +48,7 @@ class PullDenseWorker {
   void IncreaseThreadVersion(int thread_id, uint64_t table_id);
   void ResetThreadVersion(uint64_t table_id);
   void Wait(std::vector<::std::future<int32_t>>* status_vec);
+  void PullDense(bool force_update = false);
   static std::shared_ptr<PullDenseWorker> GetInstance() {
     if (NULL == s_instance_) {
       s_instance_.reset(new paddle::framework::PullDenseWorker());
@@ -92,7 +93,7 @@ class PullDenseWorker {
 // should incorporate different type of device
 class DeviceWorker {
  public:
-  DeviceWorker() {}
+  DeviceWorker() { use_cvm_ = false; }
   virtual ~DeviceWorker() {}
   virtual void Initialize(const TrainerDesc& desc) = 0;
   virtual void SetDeviceIndex(int tid) = 0;
@@ -114,6 +115,7 @@ class DeviceWorker {
   std::shared_ptr<DataFeed> device_reader_;
   int64_t batch_num_;
   FetchConfig fetch_config_;
+  bool use_cvm_;
 };
 
 class CPUWorkerBase : public DeviceWorker {
diff --git a/paddle/fluid/framework/downpour_worker.cc b/paddle/fluid/framework/downpour_worker.cc
index 8e184e5d3cbc6d73c45aef97981dda410bc0f962..0b4e959f571c4d2d9482a00647874400e2d7793b 100644
--- a/paddle/fluid/framework/downpour_worker.cc
+++ b/paddle/fluid/framework/downpour_worker.cc
@@ -63,6 +63,7 @@ void DownpourWorker::Initialize(const TrainerDesc& desc) {
 
   fleet_ptr_ = FleetWrapper::GetInstance();
   fetch_config_ = desc.fetch_config();
+  use_cvm_ = desc.use_cvm();
 }
 
 void DownpourWorker::CollectLabelInfo(size_t table_idx) {
@@ -139,14 +140,25 @@ void DownpourWorker::FillSparseValue(size_t table_idx) {
     LoD data_lod{tensor_lod};
     tensor_emb->set_lod(data_lod);
     for (int index = 0; index < len; ++index) {
-      if (ids[index] == 0u) {
-        memcpy(ptr + table.emb_dim() * index, init_value.data() + 2,
+      if (use_cvm_) {
+        if (ids[index] == 0u) {
+          memcpy(ptr + table.emb_dim() * index, init_value.data(),
+                 sizeof(float) * table.emb_dim());
+          continue;
+        }
+        memcpy(ptr + table.emb_dim() * index, fea_value[fea_idx].data(),
+               sizeof(float) * table.emb_dim());
+        fea_idx++;
+      } else {
+        if (ids[index] == 0u) {
+          memcpy(ptr + table.emb_dim() * index, init_value.data() + 2,
+                 sizeof(float) * table.emb_dim());
+          continue;
+        }
+        memcpy(ptr + table.emb_dim() * index, fea_value[fea_idx].data() + 2,
                sizeof(float) * table.emb_dim());
-        continue;
+        fea_idx++;
       }
-      memcpy(ptr + table.emb_dim() * index, fea_value[fea_idx].data() + 2,
-             sizeof(float) * table.emb_dim());
-      fea_idx++;
     }
   }
 }
@@ -197,9 +209,9 @@ void DownpourWorker::TrainFilesWithProfiler() {
       uint64_t tid = static_cast<uint64_t>(
           param_.program_config(0).pull_sparse_table_id(i));
       TableParameter table;
-      for (auto i : param_.sparse_table()) {
-        if (i.table_id() == tid) {
-          table = i;
+      for (auto j : param_.sparse_table()) {
+        if (j.table_id() == tid) {
+          table = j;
           break;
         }
       }
@@ -259,7 +271,7 @@ void DownpourWorker::TrainFilesWithProfiler() {
         fleet_ptr_->PushSparseVarsWithLabelAsync(
             *thread_scope_, tid, features_[tid], feature_labels_[tid],
             sparse_key_names_[tid], sparse_grad_names_[tid], table.emb_dim(),
-            &feature_grads_[tid], &push_sparse_status_);
+            &feature_grads_[tid], &push_sparse_status_, cur_batch, use_cvm_);
         timeline.Pause();
         push_sparse_time += timeline.ElapsedSec();
         total_time += timeline.ElapsedSec();
@@ -367,9 +379,9 @@ void DownpourWorker::TrainFiles() {
       uint64_t tid = static_cast<uint64_t>(
           param_.program_config(0).pull_sparse_table_id(i));
       TableParameter table;
-      for (auto i : param_.sparse_table()) {
-        if (i.table_id() == tid) {
-          table = i;
+      for (auto j : param_.sparse_table()) {
+        if (j.table_id() == tid) {
+          table = j;
           break;
         }
       }
@@ -411,7 +423,7 @@ void DownpourWorker::TrainFiles() {
         fleet_ptr_->PushSparseVarsWithLabelAsync(
             *thread_scope_, tid, features_[tid], feature_labels_[tid],
             sparse_key_names_[tid], sparse_grad_names_[tid], table.emb_dim(),
-            &feature_grads_[tid], &push_sparse_status_);
+            &feature_grads_[tid], &push_sparse_status_, cur_batch, use_cvm_);
       }
     }
 
diff --git a/paddle/fluid/framework/fleet/fleet_wrapper.cc b/paddle/fluid/framework/fleet/fleet_wrapper.cc
index 394ff24c466622956b18b3012c146f6f9ddd838e..fd77cdeb7cb7366a169d956f4cf44cb71e22f87f 100644
--- a/paddle/fluid/framework/fleet/fleet_wrapper.cc
+++ b/paddle/fluid/framework/fleet/fleet_wrapper.cc
@@ -281,9 +281,16 @@ void FleetWrapper::PushSparseVarsWithLabelAsync(
     const std::vector<std::string>& sparse_key_names,
     const std::vector<std::string>& sparse_grad_names, const int emb_dim,
     std::vector<std::vector<float>>* push_values,
-    std::vector<::std::future<int32_t>>* push_sparse_status) {
+    std::vector<::std::future<int32_t>>* push_sparse_status,
+    const int batch_size, const bool use_cvm) {
 #ifdef PADDLE_WITH_PSLIB
   int offset = 2;
+  int grad_dim = emb_dim;
+  if (use_cvm) {
+    offset = 0;
+    grad_dim = emb_dim - 2;
+  }
+  CHECK_GE(grad_dim, 0);
   uint64_t fea_idx = 0u;
   for (size_t i = 0; i < sparse_key_names.size(); ++i) {
     Variable* g_var = scope.FindVar(sparse_grad_names[i]);
@@ -307,7 +314,13 @@ void FleetWrapper::PushSparseVarsWithLabelAsync(
     for (auto& t : *push_values) {
       t.resize(emb_dim + offset);
     }
-
+    if (scale_sparse_gradient_with_batch_size_ && grad_dim > 0) {
+      int dim = emb_dim + offset;
+      Eigen::Map<
+          Eigen::Matrix<float, Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor>>
+          g_mat(g, g_tensor->numel() / dim, dim);
+      g_mat.rightCols(grad_dim) *= batch_size;
+    }
     for (auto id_idx = 0u; id_idx < len; ++id_idx) {
       if (ids[id_idx] == 0) {
         g += emb_dim;
@@ -315,10 +328,15 @@ void FleetWrapper::PushSparseVarsWithLabelAsync(
       }
       CHECK(fea_idx < (*push_values).size());
       CHECK(fea_idx < fea_labels.size());
-      memcpy((*push_values)[fea_idx].data() + offset, g,
-             sizeof(float) * emb_dim);
-      (*push_values)[fea_idx][0] = 1.0f;
-      (*push_values)[fea_idx][1] = static_cast<float>(fea_labels[fea_idx]);
+      if (use_cvm) {
+        memcpy((*push_values)[fea_idx].data() + offset, g,
+               sizeof(float) * emb_dim);
+      } else {
+        memcpy((*push_values)[fea_idx].data() + offset, g,
+               sizeof(float) * emb_dim);
+        (*push_values)[fea_idx][0] = 1.0f;
+        (*push_values)[fea_idx][1] = static_cast<float>(fea_labels[fea_idx]);
+      }
       g += emb_dim;
       fea_idx++;
     }
@@ -337,6 +355,89 @@ void FleetWrapper::PushSparseVarsWithLabelAsync(
 #endif
 }
 
+void FleetWrapper::LoadModel(const std::string& path, const int mode) {
+#ifdef PADDLE_WITH_PSLIB
+  auto ret = pslib_ptr_->_worker_ptr->load(path, std::to_string(mode));
+  ret.wait();
+  if (ret.get() != 0) {
+    LOG(ERROR) << "load model from path:" << path << " failed";
+    exit(-1);
+  }
+#else
+  VLOG(0) << "FleetWrapper::LoadModel does nothing when no pslib";
+#endif
+}
+
+void FleetWrapper::SaveModel(const std::string& path, const int mode) {
+#ifdef PADDLE_WITH_PSLIB
+  auto ret = pslib_ptr_->_worker_ptr->save(path, std::to_string(mode));
+  ret.wait();
+  int32_t feasign_cnt = ret.get();
+  if (feasign_cnt == -1) {
+    LOG(ERROR) << "save model failed";
+    exit(-1);
+  }
+#else
+  VLOG(0) << "FleetWrapper::SaveModel does nothing when no pslib";
+#endif
+}
+
+void FleetWrapper::ShrinkSparseTable(int table_id) {
+#ifdef PADDLE_WITH_PSLIB
+  auto ret = pslib_ptr_->_worker_ptr->shrink(table_id);
+  ret.wait();
+#else
+  VLOG(0) << "FleetWrapper::ShrinkSparseTable does nothing when no pslib";
+#endif
+}
+
+void FleetWrapper::ShrinkDenseTable(int table_id, Scope* scope,
+                                    std::vector<std::string> var_list,
+                                    float decay) {
+#ifdef PADDLE_WITH_PSLIB
+  std::vector<paddle::ps::Region> regions;
+  for (std::string& name : var_list) {
+    if (name.find("batch_sum") != std::string::npos) {
+      Variable* var = scope->FindVar(name);
+      CHECK(var != nullptr) << "var[" << name << "] not found";
+      VLOG(3) << "prepare shrink dense batch_sum";
+      LoDTensor* tensor = var->GetMutable<LoDTensor>();
+      float* g = tensor->data<float>();
+      Eigen::Map<Eigen::MatrixXf> mat(g, 1, tensor->numel());
+      mat *= decay;
+      paddle::ps::Region reg(g, tensor->numel());
+      regions.emplace_back(std::move(reg));
+    } else {
+      Variable* var = scope->FindVar(name);
+      CHECK(var != nullptr) << "var[" << name << "] not found";
+      LoDTensor* tensor = var->GetMutable<LoDTensor>();
+      float* g = tensor->data<float>();
+      paddle::ps::Region reg(g, tensor->numel());
+      regions.emplace_back(std::move(reg));
+    }
+  }
+  auto push_status = pslib_ptr_->_worker_ptr->push_dense_param(
+      regions.data(), regions.size(), table_id);
+  push_status.wait();
+  auto status = push_status.get();
+  if (status != 0) {
+    LOG(FATAL) << "push shrink dense param failed, status[" << status << "]";
+    exit(-1);
+  }
+#else
+  VLOG(0) << "FleetWrapper::ShrinkSparseTable does nothing when no pslib";
+#endif
+}
+
+void FleetWrapper::ClientFlush() {
+#ifdef PADDLE_WITH_PSLIB
+  auto ret = pslib_ptr_->_worker_ptr->flush();
+  ret.wait();
+#else
+  VLOG(0) << "FleetWrapper::ServerFlush does nothing when no pslib";
+#endif
+}
+
 int FleetWrapper::RegisterClientToClientMsgHandler(int msg_type,
                                                    MsgHandlerFunc handler) {
 #ifdef PADDLE_WITH_PSLIB
@@ -398,6 +499,24 @@ void FleetWrapper::Deserialize(std::vector<T>* t, const std::string& str) {
 #endif
 }
 
+std::default_random_engine& FleetWrapper::LocalRandomEngine() {
+  struct engine_wrapper_t {
+    std::default_random_engine engine;
+#ifdef PADDLE_WITH_PSLIB
+    engine_wrapper_t() {
+      struct timespec tp;
+      clock_gettime(CLOCK_REALTIME, &tp);
+      double cur_time = tp.tv_sec + tp.tv_nsec * 1e-9;
+      static std::atomic<uint64_t> x(0);
+      std::seed_seq sseq = {x++, x++, x++, (uint64_t)(cur_time * 1000)};
+      engine.seed(sseq);
+    }
+#endif
+  };
+  thread_local engine_wrapper_t r;
+  return r.engine;
+}
+
 template void FleetWrapper::Serialize<std::vector<MultiSlotType>>(
     const std::vector<std::vector<MultiSlotType>*>&, std::string*);
 template void FleetWrapper::Deserialize<std::vector<MultiSlotType>>(
diff --git a/paddle/fluid/framework/fleet/fleet_wrapper.h b/paddle/fluid/framework/fleet/fleet_wrapper.h
index 386e711ff71dbf978cbcb620589490d3f06d3c53..b62270a488e79c08ae897797525bc1f7cf24c9c3 100644
--- a/paddle/fluid/framework/fleet/fleet_wrapper.h
+++ b/paddle/fluid/framework/fleet/fleet_wrapper.h
@@ -55,7 +55,7 @@ namespace framework {
 class FleetWrapper {
  public:
   virtual ~FleetWrapper() {}
-  FleetWrapper() {}
+  FleetWrapper() { scale_sparse_gradient_with_batch_size_ = true; }
   // Pull sparse variables from server in Sync mode
   // Param<in>: scope, table_id, var_names, fea_keys
   // Param<out>: fea_values
@@ -99,7 +99,8 @@ class FleetWrapper {
       const std::vector<std::string>& sparse_key_names,
       const std::vector<std::string>& sparse_grad_names, const int emb_dim,
       std::vector<std::vector<float>>* push_values,
-      std::vector<::std::future<int32_t>>* push_sparse_status);
+      std::vector<::std::future<int32_t>>* push_sparse_status,
+      const int batch_size, const bool use_cvm);
 
   // Push sparse variables to server in Async mode
   // Param<In>: scope, table_id, fea_keys, sparse_grad_names
@@ -128,6 +129,19 @@ class FleetWrapper {
   // create client to client connection
   void CreateClient2ClientConnection();
 
+  // flush all push requests
+  void ClientFlush();
+  // mode = 0, load all feature
+  // mode = 1, laod delta feature, which means load diff
+  void LoadModel(const std::string& path, const int mode);
+  // mode = 0, save all feature
+  // mode = 1, save delta feature, which means save diff
+  void SaveModel(const std::string& path, const int mode);
+
+  void ShrinkSparseTable(int table_id);
+  void ShrinkDenseTable(int table_id, Scope* scope,
+                        std::vector<std::string> var_list, float decay);
+
   // register client to client communication
   typedef std::function<int32_t(int, int, const std::string&)> MsgHandlerFunc;
   int RegisterClientToClientMsgHandler(int msg_type, MsgHandlerFunc handler);
@@ -146,6 +160,9 @@ class FleetWrapper {
     return s_instance_;
   }
 
+  // this performs better than rand_r, especially large data
+  std::default_random_engine& LocalRandomEngine();
+
 #ifdef PADDLE_WITH_PSLIB
   static std::shared_ptr<paddle::distributed::PSlib> pslib_ptr_;
 #endif
@@ -158,6 +175,7 @@ class FleetWrapper {
 
  protected:
   static bool is_initialized_;
+  bool scale_sparse_gradient_with_batch_size_;
   DISABLE_COPY_AND_ASSIGN(FleetWrapper);
 };
 
diff --git a/paddle/fluid/framework/hogwild_worker.cc b/paddle/fluid/framework/hogwild_worker.cc
index 75c985d10f3b24cc1a49f2e6f87a89550f170c5d..f16fefefd71e3936033c26de7bc83c9485304a8a 100644
--- a/paddle/fluid/framework/hogwild_worker.cc
+++ b/paddle/fluid/framework/hogwild_worker.cc
@@ -27,6 +27,7 @@ void HogwildWorker::Initialize(const TrainerDesc& desc) {
   for (size_t i = 0; i < param_.skip_ops_size(); ++i) {
     skip_ops_[i] = param_.skip_ops(i);
   }
+  use_cvm_ = desc.use_cvm();
 }
 
 void HogwildWorker::CreateThreadOperators(const ProgramDesc& program) {
diff --git a/paddle/fluid/framework/pull_dense_worker.cc b/paddle/fluid/framework/pull_dense_worker.cc
index c48c7872ec23f6cfaac650b4940752ac9b8fd36c..20d7f98e93695107637107c60f5ef42b8ce9293d 100644
--- a/paddle/fluid/framework/pull_dense_worker.cc
+++ b/paddle/fluid/framework/pull_dense_worker.cc
@@ -83,28 +83,34 @@ void PullDenseWorker::Stop() {
   }
 }
 
+void PullDenseWorker::PullDense(bool force_update) {
+  pull_dense_status_.resize(0);
+  for (size_t i = 0;
+       i < dwp_param_.program_config(0).pull_dense_table_id_size(); ++i) {
+    uint64_t tid = static_cast<uint64_t>(
+        dwp_param_.program_config(0).pull_dense_table_id(i));
+    if (force_update || CheckUpdateParam(tid)) {
+      fleet_ptr_->PullDenseVarsAsync(*root_scope_, tid, dense_value_names_[tid],
+                                     &pull_dense_status_);
+      ResetThreadVersion(tid);
+    }
+  }
+  if (pull_dense_status_.size() != 0) {
+    Wait(&pull_dense_status_);
+  }
+}
+
 int PullDenseWorker::Start() {
   running_ = true;
+  // before training, we can pull dense from pserver first.
+  PullDense(true);
   t_ = std::thread(&PullDenseWorker::Run, this);
   return 0;
 }
 
 void PullDenseWorker::Run() {
   while (running_) {
-    pull_dense_status_.resize(0);
-    for (size_t i = 0;
-         i < dwp_param_.program_config(0).pull_dense_table_id_size(); ++i) {
-      uint64_t tid = static_cast<uint64_t>(
-          dwp_param_.program_config(0).pull_dense_table_id(i));
-      if (CheckUpdateParam(tid)) {
-        fleet_ptr_->PullDenseVarsAsync(
-            *root_scope_, tid, dense_value_names_[tid], &pull_dense_status_);
-        ResetThreadVersion(tid);
-      }
-    }
-    if (pull_dense_status_.size() != 0) {
-      Wait(&pull_dense_status_);
-    }
+    PullDense(false);
 #ifndef _WIN32
     usleep(sleep_time_ms_ * 1000);
 #endif
diff --git a/paddle/fluid/framework/trainer_desc.proto b/paddle/fluid/framework/trainer_desc.proto
index 4fc05ccf5c9be37e80b4ae7263166ad76eb6d6a7..ae8798b60763435da96674c1e712eedfe8bf07c1 100644
--- a/paddle/fluid/framework/trainer_desc.proto
+++ b/paddle/fluid/framework/trainer_desc.proto
@@ -30,6 +30,7 @@ message TrainerDesc {
   repeated string filelist = 5;
   optional bool debug = 6 [ default = false ];
   optional FetchConfig fetch_config = 7;
+  optional bool use_cvm = 8 [ default = false ];
 
   // device worker parameters
   optional HogwildWorkerParameter hogwild_param = 101;
diff --git a/paddle/fluid/pybind/data_set_py.cc b/paddle/fluid/pybind/data_set_py.cc
index 3f171b65ab83de5a0d84d3c29b1e82510bf69716..3e2c976076aa1e1760511c31f77cef132e116dd2 100644
--- a/paddle/fluid/pybind/data_set_py.cc
+++ b/paddle/fluid/pybind/data_set_py.cc
@@ -66,7 +66,9 @@ void BindDataset(py::module* m) {
       .def("load_into_memory", &framework::Dataset::LoadIntoMemory)
       .def("release_memory", &framework::Dataset::ReleaseMemory)
       .def("local_shuffle", &framework::Dataset::LocalShuffle)
-      .def("global_shuffle", &framework::Dataset::GlobalShuffle);
+      .def("global_shuffle", &framework::Dataset::GlobalShuffle)
+      .def("get_memory_data_size", &framework::Dataset::GetMemoryDataSize)
+      .def("get_shuffle_data_size", &framework::Dataset::GetShuffleDataSize);
 }
 
 }  // end namespace pybind
diff --git a/paddle/fluid/pybind/fleet_wrapper_py.cc b/paddle/fluid/pybind/fleet_wrapper_py.cc
index 2f6a7d2480aedd5bd37d0dbd5ccf64447e4a21ff..d279ff3d9e40eb06b69d5aa970c54d22973e8b2f 100644
--- a/paddle/fluid/pybind/fleet_wrapper_py.cc
+++ b/paddle/fluid/pybind/fleet_wrapper_py.cc
@@ -47,12 +47,17 @@ void BindFleetWrapper(py::module* m) {
       .def("run_server", &framework::FleetWrapper::RunServer)
       .def("init_worker", &framework::FleetWrapper::InitWorker)
       .def("init_model", &framework::FleetWrapper::PushDenseParamSync)
+      .def("save_model", &framework::FleetWrapper::SaveModel)
+      .def("load_model", &framework::FleetWrapper::LoadModel)
       .def("stop_server", &framework::FleetWrapper::StopServer)
       .def("gather_servers", &framework::FleetWrapper::GatherServers)
       .def("gather_clients", &framework::FleetWrapper::GatherClients)
       .def("get_clients_info", &framework::FleetWrapper::GetClientsInfo)
       .def("create_client2client_connection",
-           &framework::FleetWrapper::CreateClient2ClientConnection);
+           &framework::FleetWrapper::CreateClient2ClientConnection)
+      .def("shrink_sparse_table", &framework::FleetWrapper::ShrinkSparseTable)
+      .def("shrink_dense_table", &framework::FleetWrapper::ShrinkDenseTable)
+      .def("client_flush", &framework::FleetWrapper::ClientFlush);
 }  // end FleetWrapper
 }  // end namespace pybind
 }  // end namespace paddle
diff --git a/python/paddle/fluid/dataset.py b/python/paddle/fluid/dataset.py
index c97e0bc6e884dc2766cf57b86fe0201f04923f66..95540e0e5327d3bbc8e21f3d35555608424c2f74 100644
--- a/python/paddle/fluid/dataset.py
+++ b/python/paddle/fluid/dataset.py
@@ -29,9 +29,7 @@ class DatasetFactory(object):
     """
 
     def __init__(self):
-        """
-        Init
-        """
+        """ Init. """
         pass
 
     def create_dataset(self, datafeed_class="QueueDataset"):
@@ -39,6 +37,10 @@ class DatasetFactory(object):
         Create "QueueDataset" or "InMemoryDataset",
         the default is "QueueDataset".
 
+        Args:
+            datafeed_class(str): datafeed class name, QueueDataset or InMemoryDataset.
+                                 Default is QueueDataset.
+
         Examples:
             import paddle.fluid as fluid
             dataset = fluid.DatasetFactory().create_dataset()
@@ -52,14 +54,10 @@ class DatasetFactory(object):
 
 
 class DatasetBase(object):
-    """
-    Base dataset class
-    """
+    """ Base dataset class. """
 
     def __init__(self):
-        """
-        Init
-        """
+        """ Init. """
         # define class name here
         # to decide whether we need create in memory instance
         self.proto_desc = data_feed_pb2.DataFeedDesc()
@@ -76,7 +74,7 @@ class DatasetBase(object):
             >>> dataset.set_pipe_command("python my_script.py")
 
         Args:
-            pipe_command: pipe command
+            pipe_command(str): pipe command
 
         """
         self.proto_desc.pipe_command = pipe_command
@@ -89,7 +87,7 @@ class DatasetBase(object):
             >>> dataset.set_batch_size(128)
 
         Args:
-            batch_size: batch size
+            batch_size(int): batch size
 
         """
         self.proto_desc.batch_size = batch_size
@@ -102,7 +100,7 @@ class DatasetBase(object):
             >>> dataset.set_thread(12)
 
         Args:
-            thread_num: thread num
+            thread_num(int): thread num
         """
         self.dataset.set_thread_num(thread_num)
         self.thread_num = thread_num
@@ -115,7 +113,7 @@ class DatasetBase(object):
             >>> dataset.set_filelist(['a.txt', 'b.txt'])
 
         Args:
-            filelist: file list
+            filelist(list): file list
         """
         self.dataset.set_filelist(filelist)
 
@@ -127,7 +125,7 @@ class DatasetBase(object):
             >>> dataset.set_use_var([data, label])
 
         Args:
-            var_list: variable list
+            var_list(list): variable list
         """
         multi_slot = self.proto_desc.multi_slot_desc
         for var in var_list:
@@ -154,8 +152,8 @@ class DatasetBase(object):
             >>> dataset.set_hdfs_config("my_fs_name", "my_fs_ugi")
 
         Args:
-            fs_name: fs name
-            fs_ugi: fs ugi
+            fs_name(str): fs name
+            fs_ugi(str): fs ugi
         """
         self.dataset.set_hdfs_config(fs_name, fs_ugi)
 
@@ -190,9 +188,7 @@ class InMemoryDataset(DatasetBase):
     """
 
     def __init__(self):
-        """
-        Init
-        """
+        """ Init. """
         super(InMemoryDataset, self).__init__()
         self.proto_desc.name = "MultiSlotInMemoryDataFeed"
 
@@ -233,7 +229,7 @@ class InMemoryDataset(DatasetBase):
 
         Examples:
             >>> import paddle.fluid as fluid
-            >>> from paddle.fluid.incubate.fleet.pslib import fleet
+            >>> from paddle.fluid.incubate.fleet.parameter_server.pslib import fleet
             >>> dataset = fluid.DatasetFactory.create_dataset("InMemoryDataset")
             >>> filelist = ["a.txt", "b.txt"]
             >>> dataset.set_filelist(filelist)
@@ -241,21 +237,22 @@ class InMemoryDataset(DatasetBase):
             >>> dataset.global_shuffle(fleet)
 
         Args:
-            fleet: fleet singleton. Default None.
+            fleet(Fleet): fleet singleton. Default None.
+
         """
         trainer_num = 1
         fleet_send_batch_size = 80000
         if fleet is not None:
-            fleet.fleet_instance.role_maker_._barrier_worker()
+            fleet._role_maker._barrier_worker()
             trainer_num = fleet.worker_num()
         self.dataset.register_client2client_msg_handler()
         self.dataset.set_trainer_num(trainer_num)
         self.dataset.set_fleet_send_batch_size(fleet_send_batch_size)
         if fleet is not None:
-            fleet.fleet_instance.role_maker_._barrier_worker()
+            fleet._role_maker._barrier_worker()
         self.dataset.global_shuffle()
         if fleet is not None:
-            fleet.fleet_instance.role_maker_._barrier_worker()
+            fleet._role_maker._barrier_worker()
 
     def release_memory(self):
         """
@@ -263,7 +260,7 @@ class InMemoryDataset(DatasetBase):
 
         Example:
             >>> import paddle.fluid as fluid
-            >>> import paddle.fluid.incubate.fleet.parameter_server as fleet
+            >>> from paddle.fluid.incubate.fleet.parameter_server.pslib import fleet
             >>> dataset = fluid.DatasetFactory.create_dataset("InMemoryDataset")
             >>> filelist = ["a.txt", "b.txt"]
             >>> dataset.set_filelist(filelist)
@@ -276,6 +273,76 @@ class InMemoryDataset(DatasetBase):
         """
         self.dataset.release_memory()
 
+    def get_memory_data_size(self, fleet=None):
+        """
+        Get memory data size, user can call this function to know the num
+        of ins in all workers after load into memory.
+
+        Note:
+            This function may cause bad performance, because it has barrier
+
+        Args:
+            fleet(Fleet): Fleet Object.
+
+        Returns:
+            The size of memory data.
+
+        Example:
+            >>> import paddle.fluid as fluid
+            >>> from paddle.fluid.incubate.fleet.parameter_server.pslib import fleet
+            >>> dataset = fluid.DatasetFactory.create_dataset("InMemoryDataset")
+            >>> filelist = ["a.txt", "b.txt"]
+            >>> dataset.set_filelist(filelist)
+            >>> dataset.load_into_memory()
+            >>> print dataset.get_memory_data_size(fleet)
+
+        """
+        import numpy as np
+        local_data_size = self.dataset.get_memory_data_size()
+        local_data_size = np.array([local_data_size])
+        if fleet is not None:
+            global_data_size = local_data_size * 0
+            fleet._role_maker._node_type_comm.Allreduce(local_data_size,
+                                                        global_data_size)
+            return global_data_size[0]
+        return local_data_size[0]
+
+    def get_shuffle_data_size(self, fleet=None):
+        """
+        Get shuffle data size, user can call this function to know the num
+        of ins in all workers after local/global shuffle.
+
+        Note:
+            This function may cause bad performance to local shuffle,
+            because it has barrier. It does not affect global shuffle.
+
+        Args:
+            fleet(Fleet): Fleet Object.
+
+        Returns:
+            The size of shuffle data.
+
+        Example:
+            >>> import paddle.fluid as fluid
+            >>> from paddle.fluid.incubate.fleet.parameter_server.pslib import fleet
+            >>> dataset = fluid.DatasetFactory.create_dataset("InMemoryDataset")
+            >>> filelist = ["a.txt", "b.txt"]
+            >>> dataset.set_filelist(filelist)
+            >>> dataset.load_into_memory()
+            >>> dataset.global_shuffle(fleet)
+            >>> print dataset.get_shuffle_data_size(fleet)
+
+        """
+        import numpy as np
+        local_data_size = self.dataset.get_shuffle_data_size()
+        local_data_size = np.array([local_data_size])
+        if fleet is not None:
+            global_data_size = local_data_size * 0
+            fleet._role_maker._node_type_comm.Allreduce(local_data_size,
+                                                        global_data_size)
+            return global_data_size[0]
+        return local_data_size[0]
+
 
 class QueueDataset(DatasetBase):
     """
diff --git a/python/paddle/fluid/device_worker.py b/python/paddle/fluid/device_worker.py
index 0998f779acfea23f3a494a25b43a6fa824b985f1..2f656692738551cfe608639ba879be7cee274e1a 100644
--- a/python/paddle/fluid/device_worker.py
+++ b/python/paddle/fluid/device_worker.py
@@ -155,10 +155,16 @@ class DownpourSGD(DeviceWorker):
             self._fleet_desc.trainer_param.sparse_table[0].slot_value)
         sparse_table.sparse_grad_name.extend(
             self._fleet_desc.trainer_param.sparse_table[0].slot_gradient)
-        sparse_table.emb_dim = \
-                    self._fleet_desc.server_param.downpour_server_param.downpour_table_param[
-                        0].accessor.fea_dim - 2
-        sparse_table.fea_dim = sparse_table.emb_dim + 2
+        if opt_info["use_cvm"]:
+            sparse_table.emb_dim = \
+                self._fleet_desc.server_param.downpour_server_param.downpour_table_param[
+                0].accessor.fea_dim
+            sparse_table.fea_dim = sparse_table.emb_dim
+        else:
+            sparse_table.emb_dim = \
+                self._fleet_desc.server_param.downpour_server_param.downpour_table_param[
+                0].accessor.fea_dim - 2
+            sparse_table.fea_dim = sparse_table.emb_dim + 2
         # TODO(guru4elephant): hard code here, need to improve
         sparse_table.label_var_name = "click"
 
diff --git a/python/paddle/fluid/executor.py b/python/paddle/fluid/executor.py
index 063b65e8eefd6407a5b9a16930c8da129e5f7df6..68abd7e7f723ae4a076c2c1b6428acea3b73dbcc 100644
--- a/python/paddle/fluid/executor.py
+++ b/python/paddle/fluid/executor.py
@@ -822,8 +822,7 @@ class Executor(object):
         trainer._set_infer(True)
         trainer._gen_trainer_desc()
         dataset._prepare_to_run()
-        if debug:
-            self._dump_debug_info(program=program, trainer=trainer)
+        self._dump_debug_info(program=program, trainer=trainer)
         self._default_executor.run_from_dataset(program.desc, scope,
                                                 dataset.dataset,
                                                 trainer._desc())
@@ -902,8 +901,7 @@ class Executor(object):
             print_period=print_period)
         trainer._gen_trainer_desc()
         dataset._prepare_to_run()
-        if debug:
-            self._dump_debug_info(program=program, trainer=trainer)
+        self._dump_debug_info(program=program, trainer=trainer)
         self._default_executor.run_from_dataset(program.desc, scope,
                                                 dataset.dataset,
                                                 trainer._desc())
diff --git a/python/paddle/fluid/trainer_desc.py b/python/paddle/fluid/trainer_desc.py
index c742ee002aa6c470c41d46978a4e08fc774c3152..d61b4c9d97e8774decf4725ab55232e685ace60b 100644
--- a/python/paddle/fluid/trainer_desc.py
+++ b/python/paddle/fluid/trainer_desc.py
@@ -61,6 +61,9 @@ class TrainerDesc(object):
     def _set_program(self, program):
         self._program = program
 
+    def _set_use_cvm(self, use_cvm=False):
+        self.proto_desc.use_cvm = use_cvm
+
     def _desc(self):
         from google.protobuf import text_format
         return text_format.MessageToString(self.proto_desc)
diff --git a/python/paddle/fluid/trainer_factory.py b/python/paddle/fluid/trainer_factory.py
index 871b663663e87a08ef3edaf58a4480b85caf4c4a..1c9630a885118b3359ce59eabacbb137b87b8152 100644
--- a/python/paddle/fluid/trainer_factory.py
+++ b/python/paddle/fluid/trainer_factory.py
@@ -38,4 +38,5 @@ class TrainerFactory(object):
             device_worker._set_fleet_desc(opt_info["fleet_desc"])
             trainer._set_device_worker(device_worker)
             trainer._set_fleet_desc(opt_info["fleet_desc"])
+            trainer._set_use_cvm(opt_info["use_cvm"])
         return trainer