diff --git a/modules/llm-cache/ds/vineyard_file.cc b/modules/llm-cache/ds/vineyard_file.cc
index c2b4a7ab5..47de9f9b7 100644
--- a/modules/llm-cache/ds/vineyard_file.cc
+++ b/modules/llm-cache/ds/vineyard_file.cc
@@ -273,6 +273,7 @@ std::shared_ptr<Object> VineyardFileBuilder::SealAndPersist(
   ObjectMeta blob_meta;
   if (ipc_client.Connected()) {
     std::shared_ptr<Object> object;
+    writer_->Shrink(ipc_client, writer_->size());
     writer_->Seal(ipc_client, object);
     blob_meta = object->meta();
     ipc_client.Persist(blob_meta.GetId());
@@ -282,6 +283,7 @@ std::shared_ptr<Object> VineyardFileBuilder::SealAndPersist(
   }
   vineyardFile->meta_.AddMember("buffer", blob_meta);
   vineyardFile->meta_.AddKeyValue("path", path_);
+  vineyardFile->meta_.AddKeyValue("size", Size());
   vineyardFile->meta_.SetTypeName(type_name<VineyardFile>());
 
   auto access_time = std::chrono::system_clock::now().time_since_epoch();
@@ -312,6 +314,7 @@ std::vector<std::shared_ptr<Object>> VineyardFileBuilder::BatchedSealAndPersist(
   if (ipc_client.Connected()) {
     for (auto builder : builders) {
       std::shared_ptr<Object> object;
+      builder->writer_->Shrink(ipc_client, builder->writer_->size());
       builder->writer_->Seal(ipc_client, object);
       blob_metas.push_back(object->meta());
     }
@@ -334,6 +337,7 @@ std::vector<std::shared_ptr<Object>> VineyardFileBuilder::BatchedSealAndPersist(
     }
     vineyard_file->meta_.AddMember("buffer", blob_metas[i]);
     vineyard_file->meta_.AddKeyValue("path", builders[i]->path_);
+    vineyard_file->meta_.AddKeyValue("size", builders[i]->Size());
     vineyard_file->meta_.SetTypeName(type_name<VineyardFile>());
 
     auto access_time = std::chrono::system_clock::now().time_since_epoch();
diff --git a/modules/llm-cache/storage/file_storage.cc b/modules/llm-cache/storage/file_storage.cc
index 2ce9b570a..28168705f 100644
--- a/modules/llm-cache/storage/file_storage.cc
+++ b/modules/llm-cache/storage/file_storage.cc
@@ -95,6 +95,12 @@ Status FileStorage::Update(
                            " should be multiple of batch size " +
                            std::to_string(chunkSize) + "!");
   }
+  if (tokenList.size() > MAX_CACHE_TOKEN_LENGTH) {
+    LOG(WARNING)
+        << "The token list size is larger than the maximum cache token "
+           "length. This token list will be ignored!";
+    return Status::OK();
+  }
 
   std::vector<std::string> pathList;
   std::set<std::string> createFileSet;
@@ -281,6 +287,12 @@ Status FileStorage::Update(
                            " should be multiple of batch size " +
                            std::to_string(chunkSize) + "!");
   }
+  if (tokenList.size() > MAX_CACHE_TOKEN_LENGTH) {
+    LOG(WARNING)
+        << "The token list size is larger than the maximum cache token "
+           "length. This token list will be ignored!";
+    return Status::OK();
+  }
 
   std::vector<std::string> pathList;
   std::set<std::string> createFileSet;
@@ -427,6 +439,12 @@ Status FileStorage::BatchedUpdate(
                            " should be multiple of batch size " +
                            std::to_string(chunkSize) + "!");
   }
+  if (tokenList.size() > MAX_CACHE_TOKEN_LENGTH) {
+    LOG(WARNING)
+        << "The token list size is larger than the maximum cache token "
+           "length. This token list will be ignored!";
+    return Status::OK();
+  }
 
   std::vector<std::string> pathList;
   std::set<std::string> createFileSet;
diff --git a/modules/llm-cache/storage/file_storage.h b/modules/llm-cache/storage/file_storage.h
index dd74f42ef..1a8cc89cf 100644
--- a/modules/llm-cache/storage/file_storage.h
+++ b/modules/llm-cache/storage/file_storage.h
@@ -34,6 +34,8 @@ limitations under the License.
 #define SECOND_TO_MICROSECOND 1000000
 #define SECOND_TO_NANOSECOND 1000000000
 
+#define MAX_CACHE_TOKEN_LENGTH 65536
+
 namespace vineyard {
 
 struct FileDescriptor {};
diff --git a/modules/llm-cache/storage/vineyard_file_storage.h b/modules/llm-cache/storage/vineyard_file_storage.h
index 5911c5c6d..b967cbc8a 100644
--- a/modules/llm-cache/storage/vineyard_file_storage.h
+++ b/modules/llm-cache/storage/vineyard_file_storage.h
@@ -62,8 +62,8 @@ class VineyardFileStorage : public FileStorage {
     this->globalGCInterval = std::chrono::seconds(globalGCInterval);
     this->globalFileTTL = std::chrono::seconds(globalTTL);
     this->enableGlobalGC = enableGlobalGC;
-    this->max_file_size_ =
-        tensorNBytes * 2 * layer * chunkSize + 65536 * sizeof(int);
+    this->max_file_size_ = tensorNBytes * 2 * layer * chunkSize +
+                           MAX_CACHE_TOKEN_LENGTH * sizeof(int);
   }
 
   ~VineyardFileStorage() = default;
diff --git a/src/client/rpc_client.cc b/src/client/rpc_client.cc
index 8ca751cc7..0ed089a8a 100644
--- a/src/client/rpc_client.cc
+++ b/src/client/rpc_client.cc
@@ -258,7 +258,7 @@ Status RPCClient::RDMAReleaseMemInfo(RegisterMemInfo& remote_info) {
   void* buffer;
   RETURN_ON_ERROR(this->rdma_client_->GetTXFreeMsgBuffer(buffer));
   VineyardMsg* msg = reinterpret_cast<VineyardMsg*>(buffer);
-  msg->type = VINEYARD_RELEASE_MEM;
+  msg->type = VINEYARD_MSG_RELEASE_MEM;
   msg->remoteMemInfo.remote_address = (uint64_t) remote_info.address;
   msg->remoteMemInfo.len = remote_info.size;
   msg->remoteMemInfo.mr_desc = remote_info.mr_desc;
diff --git a/src/common/rdma/util.h b/src/common/rdma/util.h
index 6a3ef20ba..f6247a3ac 100644
--- a/src/common/rdma/util.h
+++ b/src/common/rdma/util.h
@@ -51,10 +51,11 @@ namespace vineyard {
 #endif  // defined(__linux__)
 
 enum VINEYARD_MSG_OPT {
+  VINEYARD_MSG_EMPTY = 1,
   VINEYARD_MSG_CONNECT,
   VINEYARD_MSG_EXCHANGE_KEY,
   VINEYARD_MSG_REQUEST_MEM,
-  VINEYARD_RELEASE_MEM,
+  VINEYARD_MSG_RELEASE_MEM,
   VINEYARD_MSG_CLOSE,
 };
 
diff --git a/src/server/async/rpc_server.cc b/src/server/async/rpc_server.cc
index 90fe1fbe3..9b4af00d2 100644
--- a/src/server/async/rpc_server.cc
+++ b/src/server/async/rpc_server.cc
@@ -245,11 +245,11 @@ void RPCServer::doVineyardRequestMemory(VineyardRecvContext* recv_context,
     send_msg->remoteMemInfo.len = 0;
 
     VineyardSendContext* send_context = new VineyardSendContext();
-    memset(&send_context->attr, 0, sizeof(send_context->attr));
+    memset(send_context, 0, sizeof(VineyardSendContext));
     send_context->attr.msg_buffer = msg;
     rdma_server_->Send(recv_context->rdma_conn_id,
                        recv_context->attr.msg_buffer, sizeof(VineyardMsg),
-                       recv_context);
+                       send_context);
     return;
   }
 
@@ -272,7 +272,7 @@ void RPCServer::doVineyardRequestMemory(VineyardRecvContext* recv_context,
   send_msg->remoteMemInfo.mr_desc = remote_request_mem_info.mr_desc;
 
   VineyardSendContext* send_context = new VineyardSendContext();
-  memset(&send_context->attr, 0, sizeof(send_context->attr));
+  memset(send_context, 0, sizeof(VineyardSendContext));
   send_context->attr.msg_buffer = msg;
 
   std::lock_guard<std::recursive_mutex> scope_lock(this->rdma_mutex_);
@@ -358,6 +358,24 @@ void RPCServer::doPrepareRecv(uint64_t rdma_conn_id) {
   rdma_server_->Recv(rdma_conn_id, msg, sizeof(VineyardMsg), context);
 }
 
+void RPCServer::doNothing(VineyardRecvContext* recv_context) {
+  void* msg = nullptr;
+  rdma_server_->GetTXFreeMsgBuffer(msg);
+  VineyardMsg* send_msg = reinterpret_cast<VineyardMsg*>(msg);
+  send_msg->type = VINEYARD_MSG_REQUEST_MEM;
+
+  send_msg->remoteMemInfo.remote_address = 0;
+  send_msg->remoteMemInfo.key = 0;
+  send_msg->remoteMemInfo.len = 0;
+  send_msg->remoteMemInfo.mr_desc = 0;
+
+  VineyardSendContext* send_context = new VineyardSendContext();
+  memset(send_context, 0, sizeof(VineyardSendContext));
+  send_context->attr.msg_buffer = msg;
+  rdma_server_->Send(recv_context->rdma_conn_id, msg, sizeof(VineyardMsg),
+                     send_context);
+}
+
 void RPCServer::doRDMARecv() {
   while (1) {
     void* context = nullptr;
@@ -415,7 +433,7 @@ void RPCServer::doRDMARecv() {
         rdma_server_->Recv(
             recv_context->rdma_conn_id, reinterpret_cast<void*>(recv_msg),
             sizeof(VineyardMsg), reinterpret_cast<void*>(recv_context));
-      } else if (recv_msg->type == VINEYARD_RELEASE_MEM) {
+      } else if (recv_msg->type == VINEYARD_MSG_RELEASE_MEM) {
         boost::asio::post(
             vs_ptr_->GetIOContext(), [this, recv_context_tmp, recv_msg_tmp] {
               doVineyardReleaseMemory(recv_context_tmp, recv_msg_tmp);
@@ -425,6 +443,16 @@ void RPCServer::doRDMARecv() {
         rdma_server_->Recv(
             recv_context->rdma_conn_id, reinterpret_cast<void*>(recv_msg),
             sizeof(VineyardMsg), reinterpret_cast<void*>(recv_context));
+      } else if (recv_msg->type == VINEYARD_MSG_EMPTY) {
+        boost::asio::post(vs_ptr_->GetIOContext(),
+                          [this, recv_context_tmp, recv_msg_tmp] {
+                            doNothing(recv_context_tmp);
+                            delete recv_msg_tmp;
+                            delete recv_context_tmp;
+                          });
+        rdma_server_->Recv(
+            recv_context->rdma_conn_id, reinterpret_cast<void*>(recv_msg),
+            sizeof(VineyardMsg), reinterpret_cast<void*>(recv_context));
       } else {
         LOG(ERROR) << "Unknown message type: " << recv_msg->type;
         rdma_server_->Recv(
diff --git a/src/server/async/rpc_server.h b/src/server/async/rpc_server.h
index 1254acf93..567fbb56d 100644
--- a/src/server/async/rpc_server.h
+++ b/src/server/async/rpc_server.h
@@ -85,6 +85,8 @@ class RPCServer : public SocketServer,
 
   void doPrepareRecv(uint64_t rdma_conn_id);
 
+  void doNothing(VineyardRecvContext* recv_context);
+
   const json rpc_spec_;
   asio::ip::tcp::acceptor acceptor_;
   asio::ip::tcp::socket socket_;
diff --git a/src/server/util/remote.cc b/src/server/util/remote.cc
index 295df3c8b..ee69f0059 100644
--- a/src/server/util/remote.cc
+++ b/src/server/util/remote.cc
@@ -144,7 +144,7 @@ Status RemoteClient::RDMAReleaseMemInfo(RegisterMemInfo& remote_info) {
   void* buffer;
   this->rdma_client_->GetTXFreeMsgBuffer(buffer);
   VineyardMsg* msg = reinterpret_cast<VineyardMsg*>(buffer);
-  msg->type = VINEYARD_RELEASE_MEM;
+  msg->type = VINEYARD_MSG_RELEASE_MEM;
   msg->remoteMemInfo.remote_address = (uint64_t) remote_info.address;
   msg->remoteMemInfo.len = remote_info.size;
   VLOG(100) << "Send remote addr: "