anchor.diff:              put(<<"cloud.zones.zfs.write.time">>, V, SnapTime,
                   [{<<"zone">>, Zone}], State);
           _ ->
  -            State
  +            {ok, State}
       end.
   
   parse_iface(<<"z", _, $_, IFace/binary>>) ->
  
positive.code:     tachyon_mps:provide(),
      case tachyon_kstat_pkg:decode(Msg) of
          {ok, {_, <<"global">>, _, _, _}} ->
              State;
          {ok, P} ->
              {ok, do_zone(P, State)};
          E ->
              lager:error("[msg] ~p", [E]),
              {ok, State}
  
negative.code: put(Metric, Value, Time, Args, State = #state{db = DBs}) ->
      DBs1 = [{Mod, Mod:put(Metric, Value, Time, Args, DB)} ||
                 {Mod, DB} <- DBs],
      {ok, State#state{db = DBs1}}.
  