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List:       gluster-devel
Subject:    [Gluster-devel] Issues with fallocate, discard and zerofill
From:       anand.avati () gmail ! com (Anand Avati)
Date:       2013-08-14 6:41:47
Message-ID: CAFboF2x=JRfHwAT9SKoh72aORL1sBrLbcRXdEqc9GPQ29VXqWA () mail ! gmail ! com
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Shishir,
Is this in reference to the dht open file rebalance (of replaying the
operations to the destination server)? I am assuming so, as that is
something which has to be handled.

The other question is how should fallocate/discard be handled by self-heal
in AFR. I'm not sure how important it is, but will be certainly good to
bounce some ideas off here. Maybe we should implement a fiemap fop to query
extents/holes and replay them in the other serverl?

Avati



On Tue, Aug 13, 2013 at 10:49 PM, Bharata B Rao <bharata.rao at gmail.com>wrote:

> Hi Avati, Brian,
> 
> During the recently held gluster meetup, Shishir mentioned about a
> potential problem (related to fd migration etc) in the zerofill
> implementation (http://review.gluster.org/#/c/5327/) and also
> mentioned that same/similar issues are present with fallocate and
> discard implementations. Since zerofill has been modelled on
> fallocate/discard, I was wondering if it would be possible to address
> these issues in fallocate/discard first so that we could potentially
> follow the same in zerofill implementation.
> 
> Regards,
> Bharata.
> --
> http://raobharata.wordpress.com/
> 
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> Gluster-devel at nongnu.org
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> 
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