diff --git a/CMakeLists.txt b/CMakeLists.txt
index bd4b65c2c37..05ed9e10fac 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -262,6 +262,8 @@ target_sources(kvrocks2redis PRIVATE
         src/scripting.h
         src/rand.cc
         src/rand.h
+        src/sha1.cc
+        src/sha1.h
         tools/kvrocks2redis/config.cc
         tools/kvrocks2redis/config.h
         tools/kvrocks2redis/main.cc
diff --git a/kvrocks.conf b/kvrocks.conf
index 4c7f31979cf..6876adb4ff3 100644
--- a/kvrocks.conf
+++ b/kvrocks.conf
@@ -20,10 +20,6 @@ timeout 0
 # The number of worker's threads, increase or decrease it would effect the performance.
 workers 8
 
-# The number of replication worker's threads, increase or decrease it would effect the replication performance.
-# Default: 1
-repl-workers 1
-
 # By default kvrocks does not run as a daemon. Use 'yes' if you need it.
 # Note that kvrocks will write a pid file in /var/run/kvrocks.pid when daemonized.
 daemonize no
diff --git a/src/config.cc b/src/config.cc
index a9892f2d4d8..6b5677e0866 100644
--- a/src/config.cc
+++ b/src/config.cc
@@ -65,7 +65,6 @@ Config::Config() {
       {"bind", true, new StringField(&binds_, "127.0.0.1")},
       {"port", true, new IntField(&port, 6666, 1, 65535)},
       {"workers", true, new IntField(&workers, 8, 1, 256)},
-      {"repl-workers", true, new IntField(&repl_workers, 4, 1, 256)},
       {"timeout", false, new IntField(&timeout, 0, 0, INT_MAX)},
       {"tcp-backlog", true, new IntField(&backlog, 511, 0, INT_MAX)},
       {"maxclients", false, new IntField(&maxclients, 10240, 0, INT_MAX)},
@@ -78,7 +77,7 @@ Config::Config() {
       {"compact-cron", false, new StringField(&compact_cron_, "")},
       {"bgsave-cron", false, new StringField(&bgsave_cron_, "")},
       {"compaction-checker-range", false, new StringField(&compaction_checker_range_, "")},
-      {"db-name", true, new StringField(&db_name, "changeme.name")},
+      {"db-name", true, new StringField(&db_name, "change.me.db")},
       {"dir", true, new StringField(&dir, "/tmp/kvrocks")},
       {"backup-dir", true, new StringField(&backup_dir, "")},
       {"log-dir", true, new StringField(&log_dir, "")},
diff --git a/src/config.h b/src/config.h
index 89d885c6db5..39c7b465a9d 100644
--- a/src/config.h
+++ b/src/config.h
@@ -45,7 +45,6 @@ struct Config{
   ~Config();
   int port = 6666;
   int workers = 0;
-  int repl_workers = 1;
   int timeout = 0;
   int loglevel = 0;
   int backlog = 511;
diff --git a/src/redis_cmd.cc b/src/redis_cmd.cc
index b5e936f5c75..1a4d9743d8c 100644
--- a/src/redis_cmd.cc
+++ b/src/redis_cmd.cc
@@ -48,16 +48,14 @@ class CommandAuth : public Commander {
   Status Execute(Server *svr, Connection *conn, std::string *output) override {
     Config *config = svr->GetConfig();
     auto user_password = args_[1];
-    if (!conn->IsRepl()) {
-      auto iter = config->tokens.find(user_password);
-      if (iter != config->tokens.end()) {
-        conn->SetNamespace(iter->second);
-        conn->BecomeUser();
-        *output = Redis::SimpleString("OK");
-        return Status::OK();
-      }
+    auto iter = config->tokens.find(user_password);
+    if (iter != config->tokens.end()) {
+      conn->SetNamespace(iter->second);
+      conn->BecomeUser();
+      *output = Redis::SimpleString("OK");
+      return Status::OK();
     }
-    const auto requirepass = conn->IsRepl() ? config->masterauth : config->requirepass;
+    const auto requirepass = config->requirepass;
     if (!requirepass.empty() && user_password != requirepass) {
       *output = Redis::Error("ERR invaild password");
       return Status::OK();
diff --git a/src/redis_connection.cc b/src/redis_connection.cc
index 3b99f00d64a..db03251f993 100644
--- a/src/redis_connection.cc
+++ b/src/redis_connection.cc
@@ -149,7 +149,6 @@ uint64_t Connection::GetClientType() {
 
 std::string Connection::GetFlags() {
   std::string flags;
-  if (owner_->IsRepl()) flags.append("R");
   if (IsFlagEnabled(kSlave)) flags.append("S");
   if (IsFlagEnabled(kCloseAfterReply)) flags.append("c");
   if (IsFlagEnabled(kMonitor)) flags.append("M");
@@ -170,10 +169,6 @@ bool Connection::IsFlagEnabled(Flag flag) {
   return (flags_ & flag) > 0;
 }
 
-bool Connection::IsRepl() {
-  return owner_->IsRepl();
-}
-
 void Connection::SubscribeChannel(const std::string &channel) {
   for (const auto &chan : subscribe_channels_) {
     if (channel == chan) return;
@@ -295,8 +290,7 @@ void Connection::ExecuteCommands(const std::vector<Redis::CommandTokens> &to_pro
   if (to_process_cmds.empty()) return;
 
   Config *config = svr_->GetConfig();
-  std::string reply, password;
-  password = IsRepl() ? config->masterauth : config->requirepass;
+  std::string reply, password = config->requirepass;
 
   svr_->SetCurrentConnection(this);
   for (auto &cmd_tokens : to_process_cmds) {
diff --git a/src/redis_connection.h b/src/redis_connection.h
index 975679a6430..a4ccca353da 100644
--- a/src/redis_connection.h
+++ b/src/redis_connection.h
@@ -52,7 +52,6 @@ class Connection {
   void EnableFlag(Flag flag);
   void DisableFlag(Flag flag);
   bool IsFlagEnabled(Flag flag);
-  bool IsRepl();
 
   uint64_t GetID() { return id_; }
   void SetID(uint64_t id) { id_ = id; }
diff --git a/src/server.cc b/src/server.cc
index a309076fa03..f3e46bb02e4 100644
--- a/src/server.cc
+++ b/src/server.cc
@@ -1190,18 +1190,6 @@ void Server::KillClient(int64_t *killed, std::string addr, uint64_t id,
   }
 }
 
-void Server::SetReplicationRateLimit(uint64_t max_replication_mb) {
-  uint64_t max_rate_per_repl_worker = 0;
-  if (max_replication_mb > 0) {
-    max_rate_per_repl_worker = (max_replication_mb*MiB)/config_->repl_workers;
-  }
-  for (const auto &t : worker_threads_) {
-    if (t->GetWorker()->IsRepl()) {
-      t->GetWorker()->SetReplicationRateLimit(max_rate_per_repl_worker);
-    }
-  }
-}
-
 ReplState Server::GetReplicationState() {
   if (IsSlave() && replication_thread_) {
     return replication_thread_->State();
diff --git a/src/server.h b/src/server.h
index 9cbc2cb75b0..c310a37074e 100644
--- a/src/server.h
+++ b/src/server.h
@@ -124,7 +124,6 @@ class Server {
   std::atomic<uint64_t> *GetClientID();
   void KillClient(int64_t *killed, std::string addr, uint64_t id, uint64_t type,
                   bool skipme, Redis::Connection *conn);
-  void SetReplicationRateLimit(uint64_t max_replication_mb);
 
   lua_State *Lua() { return lua_; }
   Status ScriptExists(const std::string &sha);
diff --git a/src/worker.cc b/src/worker.cc
index b0ed7ac0593..a1a54be6682 100644
--- a/src/worker.cc
+++ b/src/worker.cc
@@ -13,7 +13,7 @@
 #include "server.h"
 #include "util.h"
 
-Worker::Worker(Server *svr, Config *config, bool repl) : svr_(svr), repl_(repl) {
+Worker::Worker(Server *svr, Config *config, bool repl) : svr_(svr) {
   base_ = event_base_new();
   if (!base_) throw std::exception();
 
@@ -241,36 +241,6 @@ Status Worker::Reply(int fd, const std::string &reply) {
   return Status(Status::NotOK, "connection doesn't exist");
 }
 
-int Worker::SetReplicationRateLimit(uint64_t max_replication_bytes) {
-  auto write_limit = EV_RATE_LIMIT_MAX;
-  if (max_replication_bytes > 0) {
-    write_limit = max_replication_bytes;
-  }
-  struct timeval cfg_tick = {1, 0};
-  auto old_cfg = rate_limit_group_cfg_;
-  rate_limit_group_cfg_ = ev_token_bucket_cfg_new(
-      EV_RATE_LIMIT_MAX, EV_RATE_LIMIT_MAX,
-      write_limit, write_limit,
-      &cfg_tick);
-  if (rate_limit_group_cfg_ == nullptr) {
-    LOG(ERROR) << "[server] ev_token_bucket_cfg_new error";
-    rate_limit_group_cfg_ = old_cfg;
-    return -1;
-  }
-
-  if (rate_limit_group_ != nullptr) {
-    bufferevent_rate_limit_group_set_cfg(rate_limit_group_, rate_limit_group_cfg_);
-  } else {
-    rate_limit_group_ = bufferevent_rate_limit_group_new(base_, rate_limit_group_cfg_);
-  }
-
-  if (old_cfg != nullptr) {
-    ev_token_bucket_cfg_free(old_cfg);
-  }
-
-  return 0;
-}
-
 void Worker::BecomeMonitorConn(Redis::Connection *conn) {
   conns_mu_.lock();
   conns_.erase(conn->GetFD());
@@ -358,11 +328,7 @@ void Worker::KickoutIdleClients(int timeout) {
 void WorkerThread::Start() {
   try {
     t_ = std::thread([this]() {
-      if (this->worker_->IsRepl()) {
-        Util::ThreadSetName("repl-worker");
-      } else {
-        Util::ThreadSetName("worker");
-      }
+      Util::ThreadSetName("worker");
       this->worker_->Run(std::this_thread::get_id());
     });
   } catch (const std::system_error &e) {
diff --git a/src/worker.h b/src/worker.h
index c7412928aba..e48595055cd 100644
--- a/src/worker.h
+++ b/src/worker.h
@@ -32,8 +32,6 @@ class Worker {
   Status AddConnection(Redis::Connection *c);
   Status EnableWriteEvent(int fd);
   Status Reply(int fd, const std::string &reply);
-  bool IsRepl() { return repl_; }
-  int SetReplicationRateLimit(uint64_t max_replication_bytes);
   void BecomeMonitorConn(Redis::Connection *conn);
   void FeedMonitorConns(Redis::Connection *conn, const std::vector<std::string> &tokens);
 
@@ -61,7 +59,6 @@ class Worker {
   std::map<int, Redis::Connection*> monitor_conns_;
   int last_iter_conn_fd = 0;   // fd of last processed connection in previous cron
 
-  bool repl_;
   struct bufferevent_rate_limit_group *rate_limit_group_ = nullptr;
   struct ev_token_bucket_cfg *rate_limit_group_cfg_ = nullptr;
 };