[Gluster-users] Sparse files and heal full bug fix backport to 3.6.x

[Ravishankar N]

Hi Steve,
The patch already went in for 3.6.3 
(https://bugzilla.redhat.com/show_bug.cgi?id=1187547). What version are 
you using? If it is 3.6.3 or newer, can you share the logs if this 
happens again? (or possibly try if you can reproduce the issue on your 
setup).
Thanks,
Ravi

On 02/10/2016 02:25 AM, FNU Raghavendra Manjunath wrote:
>
> Adding Pranith, maintainer of the replicate feature.
>
>
> Regards,
> Raghavendra
>
>
> On Tue, Feb 9, 2016 at 3:33 PM, Steve Dainard <sdainard at spd1.com 
> <mailto:sdainard at spd1.com>> wrote:
>
>     There is a thread from 2014 mentioning that the heal process on a
>     replica volume was de-sparsing sparse files.(1)
>
>     I've been experiencing the same issue on Gluster 3.6.x. I see there is
>     a bug closed for a fix on Gluster 3.7 (2) and I'm wondering if this
>     fix can be back-ported to Gluster 3.6.x?
>
>     My experience has been:
>     Replica 3 volume
>     1 brick went offline
>     Brought brick back online
>     Heal full on volume
>     My 500G vm-storage volume went from ~280G used to >400G used.
>
>     I've experienced this a couple times previously, and used fallocate to
>     re-sparse files but this is cumbersome at best, and lack of proper
>     heal support on sparse files could be disastrous if I didn't have
>     enough free space and ended up crashing my VM's when my storage domain
>     ran out of space.
>
>     Seeing as 3.6 is still a supported release, and 3.7 feels too bleeding
>     edge for production systems, I think it makes sense to back-port this
>     fix if possible.
>
>     Thanks,
>     Steve
>
>
>
>     1.
>     https://www.gluster.org/pipermail/gluster-users/2014-November/019512.html
>     2. https://bugzilla.redhat.com/show_bug.cgi?id=1166020
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