Gluster users - Jan 2017 - GFID Mismatch - Automatic Correction ?

Hi,

We have a 2 data node plus 1 arbiter node replicate gluster volume running
gluster 3.8.5. Clients are also using 3.8.5.

One of the data nodes failed the other night, and whilst it was down, several
files were replaced on the second data node / arbiter (and thus the filesystem
path was linked to a new GFID).

When the broken node was restarted, these files were in a gfid mismatch state. I
know how to manually correct them, but was wondering if there is an automated
way ?

I thought the cluster.favorite-child-policy volume setting of majority would
work, but it made no difference. Clients were still getting Input/output error
when attempting to access those files.


Regards,
Michael Ward

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On 01/04/2017 06:27 AM, Michael Ward wrote:
>
> Hi,
>
> We have a 2 data node plus 1 arbiter node replicate gluster volume 
> running gluster 3.8.5. Clients are also using 3.8.5.
>
> One of the data nodes failed the other night, and whilst it was down, 
> several files were replaced on the second data node / arbiter (and 
> thus the filesystem path was linked to a new GFID).
>
> When the broken node was restarted, these files were in a gfid 
> mismatch state. I know how to manually correct them, but was wondering 
> if there is an automated way ?
>
For resolving gfid-split-brains, there is no automated way or 
favorite-child policy. When you say 2 data+1 arbiter, you are using an 
actual arbiter volume right? (as opposed to a replica 2 volume + a dummy 
node which some people are referring to as arbiter for server-quourm). 
gfid-split-brains should not occur on either replica-3 or arbiter 
volumes with the steps you described.
Regards,
Ravi
> I thought the cluster.favorite-child-policy volume setting of majority 
> would work, but it made no difference. Clients were still getting 
> Input/output error when attempting to access those files.
>
> Regards,
>
> Michael Ward
>
>
>
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://www.gluster.org/mailman/listinfo/gluster-users

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