[ovirt-users] "Enable Discard" for Ceph/Cinder Disks?

Matthias Leopold matthias.leopold at meduniwien.ac.at
Mon Nov 27 10:14:01 UTC 2017


Hi,

according to http://docs.ceph.com/docs/luminous/rbd/qemu-rbd/ the use of 
Discard/TRIM for Ceph RBD disks is possible. Openstack seems to have 
implemented it 
(https://www.sebastien-han.fr/blog/2015/02/02/openstack-and-ceph-rbd-discard/). 
In oVirt there is no option "Enable Discard" for Cinder Disks (when 
choosing IDE or VirtIO-SCSI driver), even when i set 
"report_discard_supported = true" in Cinder. Are there plans for 
supporting this in the future? Can i use it right now with custom 
properties (never tried this before)?

thx
matthias



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