anchor.diff:      ?assertEqual((9 * ?DEF_NUMBER_OF_VNODES), Size_2),
   
       %% execute
  -    timer:sleep(1000),
  +    timer:sleep(100),
       {ok, Res1} = leo_redundant_manager_api:rebalance(),
       ?assertEqual(true, Res1 =/= []),
       lists:foreach(fun(Item) ->
  
positive.code:     {ok, R2} = leo_redundant_manager_api:get_redundancies_by_key(get, Key),
      case (R1#redundancies.nodes == R2#redundancies.nodes) of
          true ->
              void;
          false ->
              ?assertEqual(1, (length(R2#redundancies.nodes) -
                                   length(R1#redundancies.nodes))),
              ?debugVal({Key, R1#redundancies.vnode_id_to,
                         R1#redundancies.nodes, R2#redundancies.nodes})
      end,
      attach_1_1(Index - 1).
  
  
negative.code: 
      %% execute
      {ok, Res} = leo_redundant_manager_api:rebalance(),
      ?assertEqual(true, Res =/= []),
      lists:foreach(fun(Item) ->
                            Src  = proplists:get_value('src',  Item),
                            Dest = proplists:get_value('dest', Item),
  