diff --git a/CMakeLists.txt b/CMakeLists.txt
index 02ffc8d408..bef122aa03 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -745,19 +745,4 @@ target_link_libraries(${PROJECT_NAME}
   ${LIBUNWIND_LIBRARY}
   ${JEMALLOC_LIBRARY})
 
-option(ENABLE_IPO "enable interprocedural optimization" ON)
-if (ENABLE_IPO)
-  include(CheckIPOSupported)
-  check_ipo_supported(RESULT ipo_result OUTPUT ipo_output LANGUAGES CXX)
-
-  if (ipo_result)
-    set_property(TARGET ${PROJECT_NAME} PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
-    if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-      target_link_libraries(${PROJECT_NAME} PUBLIC "-fuse-ld=lld")
-    endif ()
-  else ()
-    message(WARNING "IPO is not supported: ${ipo_output}")
-  endif ()
-endif ()
-
 option(USE_SSL "Enable SSL support" OFF)
diff --git a/include/pika_command.h b/include/pika_command.h
index 677149a2e3..cd1cc2d5bc 100644
--- a/include/pika_command.h
+++ b/include/pika_command.h
@@ -412,6 +412,7 @@ class Cmd : public std::enable_shared_from_this<Cmd> {
   bool is_admin_require() const;
   bool is_single_partition() const;
   bool is_multi_partition() const;
+  bool is_classic_mode() const;
   bool HashtagIsConsistent(const std::string& lhs, const std::string& rhs) const;
   uint64_t GetDoDuration() const { return do_duration_; };
 
diff --git a/include/pika_conf.h b/include/pika_conf.h
index 361b2a5094..800de4d016 100644
--- a/include/pika_conf.h
+++ b/include/pika_conf.h
@@ -141,6 +141,7 @@ class PikaConf : public pstd::BaseConf {
     std::shared_lock l(rwlock_);
     return user_blacklist_;
   }
+  bool classic_mode() { return classic_mode_.load(); }
   int databases() {
     std::shared_lock l(rwlock_);
     return databases_;
diff --git a/src/pika_admin.cc b/src/pika_admin.cc
index 2eed0a5e6f..ec260f6ec7 100644
--- a/src/pika_admin.cc
+++ b/src/pika_admin.cc
@@ -161,6 +161,10 @@ void DbSlaveofCmd::DoInitial() {
     res_.SetRes(CmdRes::kWrongNum, kCmdNameDbSlaveof);
     return;
   }
+  if (!g_pika_conf->classic_mode()) {
+    res_.SetRes(CmdRes::kErrOther, "DbSlaveof only support on classic mode");
+    return;
+  }
   if (g_pika_server->role() ^ PIKA_ROLE_SLAVE || !g_pika_server->MetaSyncDone()) {
     res_.SetRes(CmdRes::kErrOther, "Not currently a slave");
     return;
@@ -414,9 +418,11 @@ void SelectCmd::DoInitial() {
     res_.SetRes(CmdRes::kInvalidIndex, kCmdNameSelect);
     return;
   }
-  if (index < 0 || index >= g_pika_conf->databases()) {
-    res_.SetRes(CmdRes::kInvalidIndex, kCmdNameSelect + " DB index is out of range");
-    return;
+  if (g_pika_conf->classic_mode()) {
+    if (index < 0 || index >= g_pika_conf->databases()) {
+      res_.SetRes(CmdRes::kInvalidIndex, kCmdNameSelect + " DB index is out of range");
+      return;
+    }
   }
   table_name_ = "db" + argv_[1];
   if (!g_pika_server->IsTableExist(table_name_)) {
@@ -922,6 +928,11 @@ void InfoCmd::InfoShardingReplication(std::string& info) {
 }
 
 void InfoCmd::InfoReplication(std::string& info) {
+  if (!g_pika_conf->classic_mode()) {
+    // In Sharding mode, show different replication info
+    InfoShardingReplication(info);
+    return;
+  }
 
   int host_role = g_pika_server->role();
   std::stringstream tmp_stream;
@@ -1347,16 +1358,16 @@ void ConfigCmd::ConfigGet(std::string& ret) {
   if (pstd::stringmatch(pattern.data(), "instance-mode", 1)) {
     elements += 2;
     EncodeString(&config_body, "instance-mode");
-    EncodeString(&config_body, "classic");
+    EncodeString(&config_body, (g_pika_conf->classic_mode() ? "classic" : "sharding"));
   }
 
-  if (pstd::stringmatch(pattern.data(), "databases", 1)) {
+  if (g_pika_conf->classic_mode() && pstd::stringmatch(pattern.data(), "databases", 1)) {
     elements += 2;
     EncodeString(&config_body, "databases");
     EncodeInt32(&config_body, g_pika_conf->databases());
   }
 
-  if (pstd::stringmatch(pattern.data(), "default-slot-num", 1)) {
+  if (!g_pika_conf->classic_mode() && pstd::stringmatch(pattern.data(), "default-slot-num", 1)) {
     elements += 2;
     EncodeString(&config_body, "default-slot-num");
     EncodeInt32(&config_body, g_pika_conf->default_slot_num());
@@ -2329,7 +2340,9 @@ void HelloCmd::Do(std::shared_ptr<Partition> partition) {
   };
   // just for redis resp2 protocol
   fvs.push_back({"proto", "2"});
-  fvs.push_back({"mode", "classic"});
+  if (g_pika_conf->classic_mode()) {
+    fvs.push_back({"mode", "classic"});
+  }
   int host_role = g_pika_server->role();
   switch (host_role) {
     case PIKA_ROLE_SINGLE:
diff --git a/src/pika_auxiliary_thread.cc b/src/pika_auxiliary_thread.cc
index f8fc7effb7..d65de95903 100644
--- a/src/pika_auxiliary_thread.cc
+++ b/src/pika_auxiliary_thread.cc
@@ -21,9 +21,13 @@ PikaAuxiliaryThread::~PikaAuxiliaryThread() {
 
 void* PikaAuxiliaryThread::ThreadMain() {
   while (!should_stop()) {
-    if (g_pika_server->ShouldMetaSync()) {
-      g_pika_rm->SendMetaSyncRequest();
-    } else if (g_pika_server->MetaSyncDone()) {
+    if (g_pika_conf->classic_mode()) {
+      if (g_pika_server->ShouldMetaSync()) {
+        g_pika_rm->SendMetaSyncRequest();
+      } else if (g_pika_server->MetaSyncDone()) {
+        g_pika_rm->RunSyncSlavePartitionStateMachine();
+      }
+    } else {
       g_pika_rm->RunSyncSlavePartitionStateMachine();
     }
 
diff --git a/src/pika_client_conn.cc b/src/pika_client_conn.cc
index 89760e8bd8..20b970e282 100644
--- a/src/pika_client_conn.cc
+++ b/src/pika_client_conn.cc
@@ -161,7 +161,7 @@ void PikaClientConn::ProcessSlowlog(const PikaCmdArgsType& argv, uint64_t start_
 
 void PikaClientConn::ProcessMonitor(const PikaCmdArgsType& argv) {
   std::string monitor_message;
-  std::string table_name = current_table_.substr(2);
+  std::string table_name = g_pika_conf->classic_mode() ? current_table_.substr(2) : current_table_;
   monitor_message = std::to_string(1.0 * pstd::NowMicros() / 1000000) + " [" + table_name + " " + this->ip_port() + "]";
   for (PikaCmdArgsType::const_iterator iter = argv.begin(); iter != argv.end(); iter++) {
     monitor_message += " " + pstd::ToRead(*iter);
diff --git a/src/pika_cmd_table_manager.cc b/src/pika_cmd_table_manager.cc
index 2f31efed27..5a8da711e4 100644
--- a/src/pika_cmd_table_manager.cc
+++ b/src/pika_cmd_table_manager.cc
@@ -51,7 +51,11 @@ bool PikaCmdTableManager::CheckCurrentThreadDistributionMapExist(const std::thre
 void PikaCmdTableManager::InsertCurrentThreadDistributionMap() {
   auto tid = std::this_thread::get_id();
   PikaDataDistribution* distribution = nullptr;
-  distribution = new HashModulo();
+  if (g_pika_conf->classic_mode()) {
+    distribution = new HashModulo();
+  } else {
+    distribution = new Crc32();
+  }
   distribution->Init();
   std::lock_guard l(map_protector_);
   thread_distribution_map_.emplace(tid, distribution);
diff --git a/src/pika_command.cc b/src/pika_command.cc
index f92d21ea8a..319fbceaf5 100644
--- a/src/pika_command.cc
+++ b/src/pika_command.cc
@@ -518,7 +518,7 @@ void Cmd::Execute() {
     ProcessFlushAllCmd();
   } else if (name_ == kCmdNameInfo || name_ == kCmdNameConfig) {
     ProcessDoNotSpecifyPartitionCmd();
-  } else if (is_single_partition()) {
+  } else if (is_single_partition() || g_pika_conf->classic_mode()) {
     ProcessSinglePartitionCmd();
   } else if (is_multi_partition()) {
     ProcessMultiPartitionCmd();
@@ -578,8 +578,18 @@ void Cmd::ProcessFlushAllCmd() {
 
 void Cmd::ProcessSinglePartitionCmd() {
   std::shared_ptr<Partition> partition;
-  //a table has only one partition
-  partition = g_pika_server->GetPartitionByDbName(table_name_);
+  if (g_pika_conf->classic_mode()) {
+    // in classic mode a table has only one partition
+    partition = g_pika_server->GetPartitionByDbName(table_name_);
+  } else {
+    std::vector<std::string> cur_key = current_key();
+    if (cur_key.empty()) {
+      res_.SetRes(CmdRes::kErrOther, "Internal Error");
+      return;
+    }
+    // in sharding mode we select partition by key
+    partition = g_pika_server->GetTablePartitionByKey(table_name_, cur_key.front());
+  }
 
   if (!partition) {
     res_.SetRes(CmdRes::kErrOther, "Partition not found");
@@ -612,7 +622,11 @@ void Cmd::InternalProcessCommand(std::shared_ptr<Partition> partition,
                                  std::shared_ptr<SyncMasterPartition> sync_partition, const HintKeys& hint_keys) {
   pstd::lock::MultiRecordLock record_lock(partition->LockMgr());
   if (is_write()) {
-    record_lock.Lock(current_key());
+    if (!hint_keys.empty() && is_multi_partition() && !g_pika_conf->classic_mode()) {
+      record_lock.Lock(hint_keys.keys);
+    } else {
+      record_lock.Lock(current_key());
+    }
   }
 
   uint64_t start_us = 0;
@@ -626,7 +640,11 @@ void Cmd::InternalProcessCommand(std::shared_ptr<Partition> partition,
   DoBinlog(sync_partition);
 
   if (is_write()) {
-    record_lock.Unlock(current_key());
+    if (!hint_keys.empty() && is_multi_partition() && !g_pika_conf->classic_mode()) {
+      record_lock.Unlock(hint_keys.keys);
+    } else {
+      record_lock.Unlock(current_key());
+    }
   }
 }
 
@@ -634,7 +652,12 @@ void Cmd::DoCommand(std::shared_ptr<Partition> partition, const HintKeys& hint_k
   if (!is_suspend()) {
     partition->DbRWLockReader();
   }
-  Do(partition);
+
+  if (!hint_keys.empty() && is_multi_partition() && !g_pika_conf->classic_mode()) {
+    Split(partition, hint_keys);
+  } else {
+    Do(partition);
+  }
 
   if (!is_suspend()) {
     partition->DbRWUnLock();
@@ -733,9 +756,13 @@ bool Cmd::is_admin_require() const { return ((flag_ & kCmdFlagsMaskAdminRequire)
 bool Cmd::is_single_partition() const { return ((flag_ & kCmdFlagsMaskPartition) == kCmdFlagsSinglePartition); }
 bool Cmd::is_multi_partition() const { return ((flag_ & kCmdFlagsMaskPartition) == kCmdFlagsMultiPartition); }
 
+bool Cmd::is_classic_mode() const { return g_pika_conf->classic_mode(); }
+
 bool Cmd::HashtagIsConsistent(const std::string& lhs, const std::string& rhs) const {
-  if (GetHashkey(lhs) != GetHashkey(rhs)) {
-    return false;
+  if (is_classic_mode() == false) {
+    if (GetHashkey(lhs) != GetHashkey(rhs)) {
+      return false;
+    }
   }
   return true;
 }
diff --git a/src/pika_conf.cc b/src/pika_conf.cc
index 7475c18ada..cc1d25a9e4 100644
--- a/src/pika_conf.cc
+++ b/src/pika_conf.cc
@@ -240,14 +240,33 @@ int PikaConf::Load() {
     sync_thread_num_ = 24;
   }
 
-  GetConfInt("databases", &databases_);
-  if (databases_ < 1 || databases_ > 8) {
-    LOG(FATAL) << "config databases error, limit [1 ~ 8], the actual is: " << databases_;
-  }
-  for (int idx = 0; idx < databases_; ++idx) {
-    table_structs_.push_back({"db" + std::to_string(idx), 1, {0}});
+  std::string instance_mode;
+  GetConfStr("instance-mode", &instance_mode);
+  classic_mode_.store(instance_mode.empty() || !strcasecmp(instance_mode.data(), "classic"));
+
+  if (classic_mode_.load()) {
+    GetConfInt("databases", &databases_);
+    if (databases_ < 1 || databases_ > 8) {
+      LOG(FATAL) << "config databases error, limit [1 ~ 8], the actual is: " << databases_;
+    }
+    for (int idx = 0; idx < databases_; ++idx) {
+      table_structs_.push_back({"db" + std::to_string(idx), 1, {0}});
+    }
+  } else {
+    GetConfInt("default-slot-num", &default_slot_num_);
+    if (default_slot_num_ <= 0) {
+      LOG(FATAL) << "config default-slot-num error,"
+                 << " it should greater than zero, the actual is: " << default_slot_num_;
+    }
+    std::string pika_meta_path = db_path_ + kPikaMeta;
+    if (!pstd::FileExists(pika_meta_path)) {
+      local_meta_->StableSave({{"db0", static_cast<uint32_t>(default_slot_num_), {}}});
+    }
+    Status s = local_meta_->ParseMeta(&table_structs_);
+    if (!s.ok()) {
+      LOG(FATAL) << "parse meta file error";
+    }
   }
-
   default_table_ = table_structs_[0].table_name;
 
   int tmp_replication_num = 0;
@@ -266,7 +285,7 @@ int PikaConf::Load() {
                << " [0..." << replication_num_.load() << "]";
   }
   consensus_level_.store(tmp_consensus_level);
-  if ((consensus_level_.load() != 0 || replication_num_.load() != 0)) {
+  if (classic_mode_.load() && (consensus_level_.load() != 0 || replication_num_.load() != 0)) {
     LOG(FATAL) << "consensus-level & replication-num only configurable under sharding mode,"
                << " set it to be 0 if you are using classic mode";
   }
diff --git a/src/pika_consensus.cc b/src/pika_consensus.cc
index 447c07ea20..0c09759faa 100644
--- a/src/pika_consensus.cc
+++ b/src/pika_consensus.cc
@@ -266,7 +266,8 @@ int MemLog::InternalFindLogByBinlogOffset(const LogOffset& offset) {
 ConsensusCoordinator::ConsensusCoordinator(const std::string& table_name, uint32_t partition_id)
     : table_name_(table_name), partition_id_(partition_id) {
   std::string table_log_path = g_pika_conf->log_path() + "log_" + table_name + "/";
-  std::string log_path = table_log_path;
+  std::string log_path =
+      g_pika_conf->classic_mode() ? table_log_path : table_log_path + std::to_string(partition_id) + "/";
   context_ = std::make_shared<Context>(log_path + kContext);
   stable_logger_ = std::make_shared<StableLog>(table_name, partition_id, log_path);
   mem_logger_ = std::make_shared<MemLog>();
diff --git a/src/pika_partition.cc b/src/pika_partition.cc
index a0f5f9f0fd..f3d847fff9 100644
--- a/src/pika_partition.cc
+++ b/src/pika_partition.cc
@@ -36,19 +36,24 @@ std::string BgsaveSubPath(const std::string& table_name, uint32_t partition_id)
   return std::string(buf);
 }
 
-std::string DbSyncPath(const std::string& sync_path, const std::string& table_name, const uint32_t partition_id) {
+std::string DbSyncPath(const std::string& sync_path, const std::string& table_name, const uint32_t partition_id,
+                       bool classic_mode) {
   char buf[256];
   std::string partition_id_str = std::to_string(partition_id);
-  snprintf(buf, sizeof(buf), "%s/", table_name.data());
+  if (classic_mode) {
+    snprintf(buf, sizeof(buf), "%s/", table_name.data());
+  } else {
+    snprintf(buf, sizeof(buf), "%s/%s/", table_name.data(), partition_id_str.data());
+  }
   return sync_path + buf;
 }
 
 Partition::Partition(const std::string& table_name, uint32_t partition_id, const std::string& table_db_path)
     : table_name_(table_name), partition_id_(partition_id), bgsave_engine_(nullptr) {
-  db_path_ = table_db_path;
-  bgsave_sub_path_ = table_name;
-  dbsync_path_ = DbSyncPath(g_pika_conf->db_sync_path(), table_name_, partition_id_);
-  partition_name_ = table_name ;
+  db_path_ = g_pika_conf->classic_mode() ? table_db_path : PartitionPath(table_db_path, partition_id_);
+  bgsave_sub_path_ = g_pika_conf->classic_mode() ? table_name : BgsaveSubPath(table_name_, partition_id_);
+  dbsync_path_ = DbSyncPath(g_pika_conf->db_sync_path(), table_name_, partition_id_, g_pika_conf->classic_mode());
+  partition_name_ = g_pika_conf->classic_mode() ? table_name : PartitionName(table_name_, partition_id_);
 
   db_ = std::shared_ptr<storage::Storage>(new storage::Storage());
   rocksdb::Status s = db_->Open(g_pika_server->storage_options(), db_path_);
diff --git a/src/pika_repl_bgworker.cc b/src/pika_repl_bgworker.cc
index ac44d8b39a..9101d754bd 100644
--- a/src/pika_repl_bgworker.cc
+++ b/src/pika_repl_bgworker.cc
@@ -142,7 +142,7 @@ void PikaReplBgWorker::HandleBGWorkerWriteBinlog(void* arg) {
     const InnerMessage::InnerResponse::BinlogSync& binlog_res = res->binlog_sync((*index)[i]);
     // if pika are not current a slave or partition not in
     // BinlogSync state, we drop remain write binlog task
-    if ((!(g_pika_server->role() & PIKA_ROLE_SLAVE)) ||
+    if ((g_pika_conf->classic_mode() && !(g_pika_server->role() & PIKA_ROLE_SLAVE)) ||
         ((slave_partition->State() != ReplState::kConnected) && (slave_partition->State() != ReplState::kWaitDBSync))) {
       return;
     }
@@ -209,7 +209,7 @@ int PikaReplBgWorker::HandleWriteBinlog(net::RedisParser* parser, const net::Red
   // Monitor related
   std::string monitor_message;
   if (g_pika_server->HasMonitorClients()) {
-    std::string table_name = worker->table_name_.substr(2);
+    std::string table_name = g_pika_conf->classic_mode() ? worker->table_name_.substr(2) : worker->table_name_;
     std::string monitor_message =
         std::to_string(1.0 * pstd::NowMicros() / 1000000) + " [" + table_name + " " + worker->ip_port_ + "]";
     for (const auto& item : argv) {
diff --git a/src/pika_repl_client_conn.cc b/src/pika_repl_client_conn.cc
index a399f7a539..3ebb5d9eb5 100644
--- a/src/pika_repl_client_conn.cc
+++ b/src/pika_repl_client_conn.cc
@@ -108,6 +108,14 @@ void PikaReplClientConn::HandleMetaSyncResponse(void* arg) {
   }
 
   const InnerMessage::InnerResponse_MetaSync meta_sync = response->meta_sync();
+  if (g_pika_conf->classic_mode() != meta_sync.classic_mode()) {
+    LOG(WARNING) << "Self in " << (g_pika_conf->classic_mode() ? "classic" : "sharding") << " mode, but master in "
+                 << (meta_sync.classic_mode() ? "classic" : "sharding")
+                 << " mode, failed to establish master-slave relationship";
+    g_pika_server->SyncError();
+    conn->NotifyClose();
+    return;
+  }
 
   std::vector<TableStruct> master_table_structs;
   for (int idx = 0; idx < meta_sync.tables_info_size(); ++idx) {
diff --git a/src/pika_repl_server_conn.cc b/src/pika_repl_server_conn.cc
index 0a49ad8c19..f7b57b8418 100644
--- a/src/pika_repl_server_conn.cc
+++ b/src/pika_repl_server_conn.cc
@@ -46,6 +46,7 @@ void PikaReplServerConn::HandleMetaSyncRequest(void* arg) {
       g_pika_server->BecomeMaster();
       response.set_code(InnerMessage::kOk);
       InnerMessage::InnerResponse_MetaSync* meta_sync = response.mutable_meta_sync();
+      meta_sync->set_classic_mode(g_pika_conf->classic_mode());
       for (const auto& table_struct : table_structs) {
         InnerMessage::InnerResponse_MetaSync_TableInfo* table_info = meta_sync->add_tables_info();
         table_info->set_table_name(table_struct.table_name);
diff --git a/src/pika_rm.cc b/src/pika_rm.cc
index 448e671a27..b3f7871c20 100644
--- a/src/pika_rm.cc
+++ b/src/pika_rm.cc
@@ -28,7 +28,11 @@ SyncPartition::SyncPartition(const std::string& table_name, uint32_t partition_i
     : partition_info_(table_name, partition_id) {}
 
 std::string SyncPartition::PartitionName() {
-  return partition_info_.table_name_;
+  if (g_pika_conf->classic_mode()) {
+    return partition_info_.table_name_;
+  } else {
+    return partition_info_.ToString();
+  }
 }
 
 /* SyncMasterPartition*/
diff --git a/src/pika_server.cc b/src/pika_server.cc
index 58a01486b1..31055dcee2 100644
--- a/src/pika_server.cc
+++ b/src/pika_server.cc
@@ -248,6 +248,23 @@ bool PikaServer::readonly(const std::string& table_name, const std::string& key)
   if ((role_ & PIKA_ROLE_SLAVE) && g_pika_conf->slave_read_only()) {
     return true;
   }
+  if (!g_pika_conf->classic_mode()) {
+    std::shared_ptr<Table> table = GetTable(table_name);
+    if (table == nullptr) {
+      // swallow this error will process later
+      return false;
+    }
+    uint32_t index = g_pika_cmd_table_manager->DistributeKey(key, table->PartitionNum());
+    int role = 0;
+    Status s = g_pika_rm->CheckPartitionRole(table_name, index, &role);
+    if (!s.ok()) {
+      // swallow this error will process later
+      return false;
+    }
+    if (role & PIKA_ROLE_SLAVE) {
+      return true;
+    }
+  }
   return false;
 }
 
@@ -441,7 +458,14 @@ bool PikaServer::IsCommandSupport(const std::string& command) {
       return res;
     }
   }
-  return true;
+
+  if (g_pika_conf->classic_mode()) {
+    return true;
+  } else {
+    std::string cmd = command;
+    pstd::StringToLower(cmd);
+    return !ShardingModeNotSupportCommands.count(cmd);
+  }
 }
 
 bool PikaServer::IsTableBinlogIoError(const std::string& table_name) {
@@ -967,7 +991,7 @@ void PikaServer::DbSyncSendFile(const std::string& ip, int port, const std::stri
   }
 
   std::string local_path, target_path;
-  std::string remote_path = table_name;
+  std::string remote_path = g_pika_conf->classic_mode() ? table_name : table_name + "/" + std::to_string(partition_id);
   std::vector<std::string>::const_iterator iter = descendant.begin();
   pstd::RsyncRemote remote(ip, port, kDBSyncModule, g_pika_conf->db_sync_speed() * 1024);
   std::string secret_file_path = g_pika_conf->db_sync_path();