[Gluster-users] Quick question regarding xfs_repair
landman at scalableinformatics.com
Mon Mar 14 16:56:48 UTC 2011
On 03/14/2011 12:50 PM, Terry Haley wrote:
> My question has two parts.
> 1. If I perform an xfs_repair will gluster become out of sync with the
> filesystem in lieu of repairs?
If the xfs_repair modifies the extended attributes, it is possible that
the gluster file system will appear to be inconsistent. Same issue
would be with ext* and fsck. Gluster team would need to respond to this.
> 2. Can I trust the backups I performed after these issues cropped up
> as a result of the distribution of files across the nodes? Ie, a file is
> only ¾ complete or would gluster complain and make that file unavailable as
> it should?
Good question. Can you verify that the data stored on the corrupted
RAID hasn't been replicated to the other nodes? If so, easiest route
might be a RAID rebuild, and then a file system wipe on the effected
node, followed by a resync (assuming you are doing a replicated design).
If the bad data's been replicated, then you probably have to trash that
data (and do something similar to the above anyway).
Does your RAID kit have a scan/check function? We do this with our
units (both hardware/software RAID), and schedule full scans at least
weekly. Strongly advise something similar if you aren't doing it already.
Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics Inc.
email: landman at scalableinformatics.com
web : http://scalableinformatics.com
phone: +1 734 786 8423 x121
fax : +1 866 888 3112
cell : +1 734 612 4615
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