MS-640 Cache object size calculate incorrect

Former-commit-id: 63dfa23d1aef9cec5597a2aeecb2a0c73800882d

cpp/CHANGELOG.md

@@ -13,6 +13,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-601 - Docker logs error caused by get CPUTemperature error
 - MS-622 - Delete vectors should be failed if date range is invalid
 - MS-620 - Get table row counts display wrong error code
+- MS-640 - Cache object size calculate incorrect
 
 ## Improvement
 - MS-552 - Add and change the easylogging library

cpp/src/wrapper/VecIndex.cpp

@@ -37,9 +37,17 @@ namespace engine {
 
 int64_t
 VecIndex::Size() {
+    if (size_ != 0) {
+        return size_;
+    }
     return Count() * Dimension() * sizeof(float);
 }
 
+void
+VecIndex::set_size(int64_t size) {
+    size_ = size;
+}
+
 struct FileIOReader {
     std::fstream fs;
     std::string name;
@@ -157,9 +165,10 @@ GetVecIndexFactory(const IndexType& type, const Config& cfg) {
 }
 
 VecIndexPtr
-LoadVecIndex(const IndexType& index_type, const knowhere::BinarySet& index_binary) {
+LoadVecIndex(const IndexType& index_type, const knowhere::BinarySet& index_binary, int64_t size) {
     auto index = GetVecIndexFactory(index_type);
     index->Load(index_binary);
+    index->set_size(size);
     return index;
 }
 
@@ -205,7 +214,7 @@ read_index(const std::string& location) {
         delete[] meta;
     }
 
-    return LoadVecIndex(current_type, load_data_list);
+    return LoadVecIndex(current_type, load_data_list, length);
 }
 
 Status

cpp/src/wrapper/VecIndex.h

@@ -87,6 +87,9 @@ class VecIndex : public cache::DataObj {
     int64_t
     Size() override;
 
+    void
+    set_size(int64_t size);
+
     virtual knowhere::BinarySet
     Serialize() = 0;
 
@@ -115,6 +118,8 @@ class VecIndex : public cache::DataObj {
         return Status::OK();
     }
     ////////////////
+ private:
+    int64_t size_ = 0;
 };
 
 extern Status
@@ -127,7 +132,7 @@ extern VecIndexPtr
 GetVecIndexFactory(const IndexType& type, const Config& cfg = Config());
 
 extern VecIndexPtr
-LoadVecIndex(const IndexType& index_type, const knowhere::BinarySet& index_binary);
+LoadVecIndex(const IndexType& index_type, const knowhere::BinarySet& index_binary, int64_t size);
 
 extern IndexType
 ConvertToCpuIndexType(const IndexType& type);