diff --git a/core/src/db/DBImpl.cpp b/core/src/db/DBImpl.cpp
index 722c14b352..68020474ac 100644
--- a/core/src/db/DBImpl.cpp
+++ b/core/src/db/DBImpl.cpp
@@ -1937,7 +1937,7 @@ DBImpl::QueryAsync(const std::shared_ptr<server::Context>& context, meta::FilesH
 }
 
 Status
-DBImpl::HybridQueryAsync(const std::shared_ptr<server::Context>& context, const std::string& table_id,
+DBImpl::HybridQueryAsync(const std::shared_ptr<server::Context>& context, const std::string& collection_id,
                          meta::FilesHolder& files_holder, context::HybridSearchContextPtr hybrid_search_context,
                          query::GeneralQueryPtr general_query,
                          std::unordered_map<std::string, engine::meta::hybrid::DataType>& attr_type, uint64_t& nq,
diff --git a/core/src/db/DBImpl.h b/core/src/db/DBImpl.h
index 08faa26f7f..dc6c8b5f69 100644
--- a/core/src/db/DBImpl.h
+++ b/core/src/db/DBImpl.h
@@ -198,7 +198,7 @@ class DBImpl : public DB, public server::CacheConfigHandler, public server::Engi
                ResultDistances& result_distances);
 
     Status
-    HybridQueryAsync(const std::shared_ptr<server::Context>& context, const std::string& table_id,
+    HybridQueryAsync(const std::shared_ptr<server::Context>& context, const std::string& collection_id,
                      meta::FilesHolder& files_holder, context::HybridSearchContextPtr hybrid_search_context,
                      query::GeneralQueryPtr general_query,
                      std::unordered_map<std::string, engine::meta::hybrid::DataType>& attr_type, uint64_t& nq,
diff --git a/core/src/db/insert/MemManager.h b/core/src/db/insert/MemManager.h
index 377ed4964f..aeb5354eea 100644
--- a/core/src/db/insert/MemManager.h
+++ b/core/src/db/insert/MemManager.h
@@ -34,7 +34,7 @@ class MemManager {
                   const uint8_t* vectors, uint64_t lsn, std::set<std::string>& flushed_tables) = 0;
 
     virtual Status
-    InsertEntities(const std::string& table_id, int64_t length, const IDNumber* vector_ids, int64_t dim,
+    InsertEntities(const std::string& collection_id, int64_t length, const IDNumber* vector_ids, int64_t dim,
                    const float* vectors, const std::unordered_map<std::string, uint64_t>& attr_nbytes,
                    const std::unordered_map<std::string, uint64_t>& attr_size,
                    const std::unordered_map<std::string, std::vector<uint8_t>>& attr_data, uint64_t lsn,
@@ -50,7 +50,7 @@ class MemManager {
     Flush(const std::string& collection_id, bool apply_delete = true) = 0;
 
     virtual Status
-    Flush(std::set<std::string>& table_ids, bool apply_delete = true) = 0;
+    Flush(std::set<std::string>& collection_ids, bool apply_delete = true) = 0;
 
     //    virtual Status
     //    Serialize(std::set<std::string>& table_ids) = 0;
diff --git a/core/src/db/insert/MemManagerImpl.cpp b/core/src/db/insert/MemManagerImpl.cpp
index 00bf712436..20ab6c4d22 100644
--- a/core/src/db/insert/MemManagerImpl.cpp
+++ b/core/src/db/insert/MemManagerImpl.cpp
@@ -87,8 +87,9 @@ MemManagerImpl::InsertVectors(const std::string& collection_id, int64_t length,
 }
 
 Status
-MemManagerImpl::InsertEntities(const std::string& table_id, int64_t length, const IDNumber* vector_ids, int64_t dim,
-                               const float* vectors, const std::unordered_map<std::string, uint64_t>& attr_nbytes,
+MemManagerImpl::InsertEntities(const std::string& collection_id, int64_t length, const IDNumber* vector_ids,
+                               int64_t dim, const float* vectors,
+                               const std::unordered_map<std::string, uint64_t>& attr_nbytes,
                                const std::unordered_map<std::string, uint64_t>& attr_size,
                                const std::unordered_map<std::string, std::vector<uint8_t>>& attr_data, uint64_t lsn,
                                std::set<std::string>& flushed_tables) {
@@ -114,7 +115,7 @@ MemManagerImpl::InsertEntities(const std::string& table_id, int64_t length, cons
 
     std::unique_lock<std::mutex> lock(mutex_);
 
-    return InsertEntitiesNoLock(table_id, source, lsn);
+    return InsertEntitiesNoLock(collection_id, source, lsn);
 }
 
 Status
@@ -198,7 +199,7 @@ MemManagerImpl::Flush(const std::string& collection_id, bool apply_delete) {
 }
 
 Status
-MemManagerImpl::Flush(std::set<std::string>& table_ids, bool apply_delete) {
+MemManagerImpl::Flush(std::set<std::string>& collection_ids, bool apply_delete) {
     ToImmutable();
 
     MemList temp_immutable_list;
@@ -208,7 +209,7 @@ MemManagerImpl::Flush(std::set<std::string>& table_ids, bool apply_delete) {
     }
 
     std::unique_lock<std::mutex> lock(serialization_mtx_);
-    table_ids.clear();
+    collection_ids.clear();
     auto max_lsn = GetMaxLSN(temp_immutable_list);
     for (auto& mem : temp_immutable_list) {
         LOG_ENGINE_DEBUG_ << "Flushing collection: " << mem->GetTableId();
@@ -217,7 +218,7 @@ MemManagerImpl::Flush(std::set<std::string>& table_ids, bool apply_delete) {
             LOG_ENGINE_ERROR_ << "Flush collection " << mem->GetTableId() << " failed";
             return status;
         }
-        table_ids.insert(mem->GetTableId());
+        collection_ids.insert(mem->GetTableId());
         LOG_ENGINE_DEBUG_ << "Flushed collection: " << mem->GetTableId();
     }
 
diff --git a/core/src/db/insert/MemManagerImpl.h b/core/src/db/insert/MemManagerImpl.h
index 51b79cfe0c..061dfe6bc7 100644
--- a/core/src/db/insert/MemManagerImpl.h
+++ b/core/src/db/insert/MemManagerImpl.h
@@ -50,7 +50,7 @@ class MemManagerImpl : public MemManager, public server::CacheConfigHandler {
                   const uint8_t* vectors, uint64_t lsn, std::set<std::string>& flushed_tables) override;
 
     Status
-    InsertEntities(const std::string& table_id, int64_t length, const IDNumber* vector_ids, int64_t dim,
+    InsertEntities(const std::string& collection_id, int64_t length, const IDNumber* vector_ids, int64_t dim,
                    const float* vectors, const std::unordered_map<std::string, uint64_t>& attr_nbytes,
                    const std::unordered_map<std::string, uint64_t>& attr_size,
                    const std::unordered_map<std::string, std::vector<uint8_t>>& attr_data, uint64_t lsn,
@@ -66,7 +66,7 @@ class MemManagerImpl : public MemManager, public server::CacheConfigHandler {
     Flush(const std::string& collection_id, bool apply_delete = true) override;
 
     Status
-    Flush(std::set<std::string>& table_ids, bool apply_delete = true) override;
+    Flush(std::set<std::string>& collection_ids, bool apply_delete = true) override;
 
     //    Status
     //    Serialize(std::set<std::string>& table_ids) override;
diff --git a/core/src/db/insert/MemTableFile.cpp b/core/src/db/insert/MemTableFile.cpp
index 4545a84415..23b47606e0 100644
--- a/core/src/db/insert/MemTableFile.cpp
+++ b/core/src/db/insert/MemTableFile.cpp
@@ -90,9 +90,9 @@ MemTableFile::AddEntities(const VectorSourcePtr& source) {
     if (table_file_schema_.dimension_ <= 0) {
         std::string err_msg =
             "MemTableFile::Add: table_file_schema dimension = " + std::to_string(table_file_schema_.dimension_) +
-            ", table_id = " + table_file_schema_.collection_id_;
+            ", collection_id = " + table_file_schema_.collection_id_;
         LOG_ENGINE_ERROR_ << LogOut("[%s][%ld]", "insert", 0) << err_msg;
-        return Status(DB_ERROR, "Not able to create table file");
+        return Status(DB_ERROR, "Not able to create collection file");
     }
 
     size_t single_entity_mem_size = source->SingleEntitySize(table_file_schema_.dimension_);
diff --git a/core/src/db/wal/WalBuffer.cpp b/core/src/db/wal/WalBuffer.cpp
index 6458bc5ff2..027d38e651 100644
--- a/core/src/db/wal/WalBuffer.cpp
+++ b/core/src/db/wal/WalBuffer.cpp
@@ -242,7 +242,7 @@ MXLogBuffer::Append(MXLogRecord& record) {
     MXLogRecordHeader head;
     BuildLsn(mxlog_buffer_writer_.file_no, mxlog_buffer_writer_.buf_offset + (uint32_t)record_size, head.mxl_lsn);
     head.mxl_type = (uint8_t)record.type;
-    head.table_id_size = (uint16_t)record.collection_id.size();
+    head.collection_id_size = (uint16_t)record.collection_id.size();
     head.partition_tag_size = (uint16_t)record.partition_tag.size();
     head.vector_num = record.length;
     head.data_size = record.data_size;
@@ -320,7 +320,7 @@ MXLogBuffer::AppendEntity(milvus::engine::wal::MXLogRecord& record) {
     MXLogRecordHeader head;
     BuildLsn(mxlog_buffer_writer_.file_no, mxlog_buffer_writer_.buf_offset + (uint32_t)record_size, head.mxl_lsn);
     head.mxl_type = (uint8_t)record.type;
-    head.table_id_size = (uint16_t)record.collection_id.size();
+    head.collection_id_size = (uint16_t)record.collection_id.size();
     head.partition_tag_size = (uint16_t)record.partition_tag.size();
     head.vector_num = record.length;
     head.data_size = record.data_size;
@@ -440,9 +440,9 @@ MXLogBuffer::Next(const uint64_t last_applied_lsn, MXLogRecord& record) {
 
     current_read_offset += SizeOfMXLogRecordHeader;
 
-    if (head->table_id_size != 0) {
-        record.collection_id.assign(current_read_buf + current_read_offset, head->table_id_size);
-        current_read_offset += head->table_id_size;
+    if (head->collection_id_size != 0) {
+        record.collection_id.assign(current_read_buf + current_read_offset, head->collection_id_size);
+        current_read_offset += head->collection_id_size;
     } else {
         record.collection_id = "";
     }
@@ -539,9 +539,9 @@ MXLogBuffer::NextEntity(const uint64_t last_applied_lsn, milvus::engine::wal::MX
     memcpy(attr_head.attr_nbytes.data(), current_read_buf + current_read_offset, sizeof(uint64_t) * attr_head.attr_num);
     current_read_offset += sizeof(uint64_t) * attr_head.attr_num;
 
-    if (head->table_id_size != 0) {
-        record.collection_id.assign(current_read_buf + current_read_offset, head->table_id_size);
-        current_read_offset += head->table_id_size;
+    if (head->collection_id_size != 0) {
+        record.collection_id.assign(current_read_buf + current_read_offset, head->collection_id_size);
+        current_read_offset += head->collection_id_size;
     } else {
         record.collection_id = "";
     }
diff --git a/core/src/db/wal/WalBuffer.h b/core/src/db/wal/WalBuffer.h
index fee819fa65..9e421b84a2 100644
--- a/core/src/db/wal/WalBuffer.h
+++ b/core/src/db/wal/WalBuffer.h
@@ -32,7 +32,7 @@ namespace wal {
 struct MXLogRecordHeader {
     uint64_t mxl_lsn;  // log sequence number (high 32 bits: file No. inc by 1, low 32 bits: offset in file, max 4GB)
     uint8_t mxl_type;  // record type, insert/delete/update/flush...
-    uint16_t table_id_size;
+    uint16_t collection_id_size;
     uint16_t partition_tag_size;
     uint32_t vector_num;
     uint32_t data_size;