I just got bitten by this particular problem, on a heavily used disk image. I'm trying to defragment the disk images. Hop this will help.
> Le 8 juin 2017 à 07:19, Markus Stockhausen <stockhau...@collogia.de> a écrit : > > Hi Fernando, > > we personally like XFS very much. But XFS + qcow2 (even for snapshots in > OVirt) > comes close to a no-go these days. We are experience excessive fragmentation. > For more info see unresolved Redhat Info: > > https://access.redhat.com/solutions/532663 > <https://access.redhat.com/solutions/532663> > > Even with tuning the XFS allocation policy on the qcow2 directory with > > xfs_io -c 'extsize -R 2M' <qcow2-dir> > > A nice 3rd party explanation can be found here: > > https://blog.codecentric.de/en/2017/04/xfs-possible-memory-allocation-deadlock-kmem_alloc/ > > <https://blog.codecentric.de/en/2017/04/xfs-possible-memory-allocation-deadlock-kmem_alloc/> > > Markus > > Von: users-boun...@ovirt.org <mailto:users-boun...@ovirt.org> > [users-boun...@ovirt.org <mailto:users-boun...@ovirt.org>]" im Auftrag von > "FERNANDO FREDIANI [fernando.fredi...@upx.com > <mailto:fernando.fredi...@upx.com>] > Gesendet: Mittwoch, 7. Juni 2017 23:35 > An: users@ovirt.org <mailto:users@ovirt.org> > Betreff: [ovirt-users] Performance differences between ext4 and XFS > > Just wanted to find out what filesystem people are using to host Virtual > Machines in qcow2 files in a filesystem in Localstorage, ext4 or XFS ? > > I normally like XFS for big files which is the case fo VMs, but wondered if > anyone could see any performance advantage when compared with ext4. > > Fernando > <InterScan_Disclaimer.txt>_______________________________________________ > Users mailing list > Users@ovirt.org <mailto:Users@ovirt.org> > http://lists.ovirt.org/mailman/listinfo/users > <http://lists.ovirt.org/mailman/listinfo/users>
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
