diff --git a/.gitignore b/.gitignore
index 2b30f7938c8a1672acd0a14b7051af12c37889fb..275173b9677bffe028152fe8eadb3384329aeb5a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,6 @@ third_party/
 *~
 bazel-*
 third_party/
+
+# clion workspace.
+cmake-build-*
diff --git a/paddle/parameter/Parameter.h b/paddle/parameter/Parameter.h
index eb88c862034bfc144d52299347e82026094d4306..d77486ce42e049bf70cbe2a3feed0e203b2f5ac3 100644
--- a/paddle/parameter/Parameter.h
+++ b/paddle/parameter/Parameter.h
@@ -40,17 +40,6 @@ class Parameter;
 typedef std::function<void(Parameter* param)> UpdateCallback;
 typedef std::function<void(int paramId, Parameter* param)> ParamInitCallback;
 
-struct Segment {
-  int64_t beginDim;
-  int64_t endDim;
-
-  // We allow the possibility that the parameters are not stored at contiguous
-  // memory locations for speed reason (i.e. data alignemnt)
-  // This means that the dimenstion is not same as the position in the memroy
-  // buffer.
-  int64_t beginPos;  // beginning position in the local value or grad buffer
-};
-
 class Parameter;
 typedef std::shared_ptr<Parameter> ParameterPtr;
 
@@ -167,13 +156,6 @@ public:
     }
   }
 
-  void enableSharedType(ParameterType type, VectorPtr vec, MatType matType) {
-    if (!bufs_[type]) {
-      bufs_[type] = vec;
-      setMat(type, matType);
-    }
-  }
-
   /// for batchGradientMachine: blockNum is number of partitions of the matrix.
   bool isGradShared(size_t* blockNum = NULL);
 
@@ -203,12 +185,6 @@ public:
 
   const MatrixPtr& getMat(ParameterType pType) const { return mats_[pType]; }
 
-  const IVectorPtr& getIntBuf(ParameterType pType) { return intBufs_[pType]; }
-
-  void setIntBuf(ParameterType pType, const IVectorPtr& iVec) {
-    intBufs_[pType] = iVec;
-  }
-
   void setValueUpdated() { updated_ = true; }
 
   void clearValueUpdated() { updated_ = false; }
@@ -235,8 +211,6 @@ public:
    */
   bool load(std::istream& is);
 
-  std::vector<Segment>& getGradientSegments() { return gradSegments_; }
-
   void incShared() { sharedCount_++; }
 
   /**
@@ -343,7 +317,6 @@ protected:
 
   int sharedCount_;
   int updateCounter_;
-  std::vector<Segment> gradSegments_;  // segments of non-zero gradient
 
   bool updated_;
   SparseFormat format_;
@@ -351,10 +324,8 @@ protected:
   std::vector<std::shared_ptr<IParameterUpdaterHook>> updaterHooks_;
 
 public:
-  void setSharedCount(int cnt) { sharedCount_ = cnt; }
   int getSharedCount() { return sharedCount_; }
 
-  void singleUpdate(void* data);
   bool isSparse() { return config_.is_sparse(); }
   SparseFormat getFormat() { return format_; }