Re: Sparse files and heal full bug fix backport to 3.6.x

Ravishankar N <ravishankar@xxxxxxxxxx> · Wed, 10 Feb 2016 07:08:50 +0530



    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@xxxxxxxx>
          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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