anchor.diff:          false ->
               case leo_mdcr_tbl_cluster_mgr:all() of
                   {ok, Managers} ->
  -                    ok = exec(Managers, []);
  +                    ok = exec(Managers);
                   not_found ->
                       void;
                   {error, Cause} ->
  
positive.code:                 {error, Cause} ->
                      {error, Cause}
              end;
          {'EXIT', Cause} ->
              {error, Cause};
          {error, Cause} ->
              {error, Cause}
      end.
  
  
negative.code: %% @doc Retrieve status and members from a remote-cluster
  %%      and then compare 'hash' whether equal or not
  %% @private
  -spec(exec(list(#cluster_manager{})) ->
               ok | {error, any()}).
  exec([]) ->
      ok;
  exec([#cluster_manager{node = Node,
                         cluster_id = ClusterId}|Rest]) ->
      %% Retrieve own cluster-id
      case leo_cluster_tbl_conf:get() of
          {ok,  #?SYSTEM_CONF{cluster_id = ClusterId}} ->
              ok;
          {ok,  #?SYSTEM_CONF{}} ->
              %% Retrieve the status of remote-cluster,
              %% then compare its status in the local with the retrieved data
              case catch leo_rpc:call(Node, leo_redundant_manager_api,
                                      get_cluster_status, []) of
                  {ok, #?CLUSTER_STAT{state    = Status_1,
                                      checksum = Checksum_1} = ClusterStat} ->
                      case leo_mdcr_tbl_cluster_stat:get(ClusterId) of
                          {ok, #?CLUSTER_STAT{state    = Status_2,
                                              checksum = Checksum_2}}
                            when Status_1   == Status_2,
                                 Checksum_1 == Checksum_2 ->
                              ok;
                          {ok, LocalClusterStat} ->
                              exec_1(Node, ClusterStat, LocalClusterStat);
                          not_found ->
                              exec_1(Node, ClusterStat, undefined);
                          _ ->
                              ok
                      end;
                  _ ->
                      ok
              end,
              exec(Rest);
          Error ->
              Error
      end.
  
  
  