[Lustre-discuss] MDS Recovery: which client

[Robert Read]

On Feb 27, 2009, at 09:54 , Andreas Dilger wrote:

> On Feb 27, 2009  14:16 +0100, Thomas Roth wrote:
>> just to repeat my question without further surrounding facts and  
>> doubts;
>>
>> How can I find out which client is currently being recovered? (If the
>> MDS is in recovery at that moment)
>> How to find out which client is not recoverable (if recovery gets  
>> stuck)?
>>
>> The MDS seems to know, because during it is waiting for such a  
>> client -
>> I'd like to know, too.
>
> Good question, and I don't think there is a good answer.  There is a  
> patch
> developed recently to put the recovery state of each client into / 
> proc,
> but I'm not sure where it landed yet.  I _think_ this would allow  
> you to
> do "grep RECOVERING /proc/fs/lustre/mds/*/exports/*/import_state" or
> similar.
>
> Robert, do you recall the bug and/or state of the per-client export  
> stats?

I don't recall any bug for per-client export stats. As of 1.6.6 there  
is now a file in proc for per-import stats, but those are on the  
client, eg:

[root at client1 tests]# cat /proc/fs/lustre/mdc/*/import
import: lustre-MDT0000-mdc-cf4f3e00
     target: lustre-MDT0000_UUID at 10.0.1.180@tcp
     state: FULL
     inflight: 0
     unregistering: 0
     conn_cnt: 2
     generation: 1
     inval_cnt: 0
     last_replay_transno: 0
     peer_committed_transno: 0
     last_trasno_checked: 0
     flags: replayable pingable

robert

>
>
> Cheers, Andreas
> --
> Andreas Dilger
> Sr. Staff Engineer, Lustre Group
> Sun Microsystems of Canada, Inc.
>