4.

1.

2.

3.

17 storage server, write_data with last_write_request_id.

1 network message errors.

7 Client.

11 storage.

5.

4.

13 Directory server.

15 storage.

16 DS detected invalid namespace.

3 Storage.

12 Directory server.

20 append op.

18 storage server, replicated "delete", create_time mis-match.

10 storage.

6.

8 storage.

2 Service.

14 DEPRECATED, used in 2.0 DS.

19 replicating data inconsistance.

9 storage.