Gluster users - Jan 2016 - support for hole punching in glusterfs

Hi,
        Hole punching through fallocate succeeds for a ext4 mount path. But it
fails for a glusterfs mount path. The volume is a disperse volume.

        fallocate(fd,FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE,0,sizeof(array))
fails with a return code of EOPNOTSUPP.

       The ext4 file system mount arguments are
"rw,noexec,nosuid,nodev,user_xattr,discard".

Thanks and Regards,
Ram






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On Fri, Jan 22, 2016 at 03:05:16PM +0000, Ankireddypalle Reddy
wrote:
> Hi,
>         Hole punching through fallocate succeeds for a ext4 mount path. But
it fails for a glusterfs mount path. The volume is a disperse volume.
> 
>        
fallocate(fd,FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE,0,sizeof(array)) fails
with a return code of EOPNOTSUPP.
> 
>        The ext4 file system mount arguments are
"rw,noexec,nosuid,nodev,user_xattr,discard".
This is currently not supported yet. I'm not sure if the FUSE kernel
module support punching holes yet, either. Please file a bug for this
feature so that we can figure out a plan to work on it.

  https://bugzilla.redhat.com/enter_bug.cgi?product=GlusterFS&component=fuse

Note that support for SEEK_HOLE and SEEK_DATA is also not availeble yet.
Some work has been done, but it is not ready for inclusion at this
moment. Hopefully it lands in the upcoming 3.8 release.

  https://bugzilla.redhat.com/show_bug.cgi?id=1220173

Thanks,
Niels
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Are you doing this for EC/disperse volume?

Pranith
On 01/22/2016 08:35 PM, Ankireddypalle Reddy wrote:
>
> Hi,
>
>         Hole punching through fallocate succeeds for a ext4 mount 
> path. But it fails for a glusterfs mount path. The volume is a 
> disperse volume.
>
> fallocate(fd,FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE,0,sizeof(array)) 
> fails with a return code of EOPNOTSUPP.
>
>        The ext4 file system mount arguments are 
> ?rw,noexec,nosuid,nodev,user_xattr,discard?.
>
> Thanks and Regards,
>
> Ram
>
> ***************************Legal Disclaimer***************************
> "This communication may contain confidential and privileged material
for the
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distribution
> by others is strictly prohibited. If you have received the message by
mistake,
> please advise the sender by reply email and delete the message. Thank
you."
> **********************************************************************
>
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