anchor.diff:              case OldEpochId == EpochID of
                   true ->
                       spawn(fun() -> 
  -                        append_server_dispatch(From, Prefix, Chunk, CSum, Extra, FluName) 
  +                        append_server_dispatch(From, Prefix, Chunk, CSum, Extra, FluName, EpochID) 
                       end);
                   false ->
                       From ! {error, bad_epoch}
  
positive.code:     From ! Result,
      exit(normal).
  
  handle_append(_Prefix, <<>>, _Csum, _Extra, _FluName) ->
      {error, bad_arg};
  handle_append(Prefix, Chunk, Csum, Extra, FluName) ->
      Res = machi_flu_filename_mgr:find_or_make_filename_from_prefix(FluName, {prefix, Prefix}),
      case Res of
          {file, F} ->
              {ok, Pid} = machi_flu_metadata_mgr:start_proxy_pid(FluName, {file, F}),
  
negative.code:             {error, bad_arg}
      end.
  
  append_server_dispatch(From, Prefix, Chunk, CSum, Extra, FluName, EpochId) ->
      Result = case handle_append(Prefix, Chunk, CSum, Extra, FluName, EpochId) of
          {ok, File, Offset} ->
              {assignment, Offset, File};
          Other ->
  