Re: [Gluster-devel] Persistent AFR changelog attributes

[Anand Avati]

Ravi,

We had earlier discussed a solution for this (sometime last year) by making volgen remember xlator names and not reassign them. Copying KP with who I had discussed this to quite a level of detail. Have you guys spoken about this? IIRC the solution KP and I discussed was more generic and could also support retaining user made changes/customizations to the volfiles.

Thanks,

Avati

On Tue, Feb 11, 2014 at 8:33 PM, Ravishankar N <address@hidden> wrote:

Hello,

As you might perhaps be aware, AFR translator currently uses the client translator names  as the name of it's changelog extended attributes.

i)This can be a problem when a remove-brick operation is performed when there are pending heals happening because remove-brick causes a graph change wherein the client translator names become different.

ii) Also, for gluster snapshot volumes to work correctly, there needs to be a persistent mapping of AFR changelog attributes to the bricks.

After some internal discussions, we have come up with a new naming mechanism that ensures backward compatibility. Details on the aforementioned problems and the proposed solution are detailed in a feature page [1] for GlusterFS 3.6.
Please feel free to go through it and give your comments/ critiques.

Thanks and regards,
Ravi

[1] https://www.gluster.org/community/documentation/index.php/Features/persistent-AFR-changelog-xattributes

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