Many thanks for your input Markus. Helps to device before putting the
server in production.
Regards
Fernando
On 08/06/2017 02:19, Markus Stockhausen wrote:
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
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/
Markus
------------------------------------------------------------------------
*Von:* users-boun...@ovirt.org [users-boun...@ovirt.org]" im Auftrag
von "FERNANDO FREDIANI [fernando.fredi...@upx.com]
*Gesendet:* Mittwoch, 7. Juni 2017 23:35
*An:* 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
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