[lustre-discuss] lfsck repair quota

[Andreas Dilger]

On Apr 16, 2019, at 09:22, Mohr Jr, Richard Frank (Rick Mohr) <rmohr at utk.edu> wrote:
> 
>> On Apr 16, 2019, at 10:24 AM, Fernando Pérez <fperez at icm.csic.es> wrote:
>> 
>> According to the lustre wiki I though that the lfsck could repair corrupted quotes:
>> 
>> http://wiki.lustre.org/Lustre_Quota_Troubleshooting
> 
> Keep in mind that page is a few years old, but I assume they were referring to LFSCK Phase 2 (http://wiki.lustre.org/LFSCK_Phase_2_-_MDT-OST_Consistency_Solution_Architecture) which maintains consistency between the MDTs and OSTs.  One of the things that lfsck will do is make sure that the ownership info for a file’s MDT object matches the ownership of the OST objects for that file.  This is necessary to ensure that quota information reported by Lustre is accurate, but I don’t believe it is meant to fix any corruption in the quota files themselves.

Correct, LFSCK will repair the OST object ownership, but does not *directly* repair quota
files. That said, if an object is owned by the wrong owner for some reason, changing the
ownership _should_ transfer the quota usage properly to the new owner, so in that regard
the quota usage should be indirectly repaired by an LFSCK run.

Cheers, Andreas
---
Andreas Dilger
Principal Lustre Architect
Whamcloud