Re: [ovirt-users] Reclaim/Trim/issue_discards : how to inform my LUNs about disk space waste?

Hi Nicolas, you can find more information on this at: https://bugzilla.redhat.com/show_bug.cgi?id=981626 First of all an important note (that was already mentioned): vdsm is not using lvm.conf, so whatever change you make there it won't affect vdsm behavior. Anyway long story short, enabling issue_discards in lvm would lead to lvm commands starvation when the lv that you're removing is large and the granularity is small. The correct solution is to use blkdiscard on the lv and I happened to submit a patch series for that yesterday: http://gerrit.ovirt.org/#/q/status:open+project:vdsm+branch:master+topic:... (very much experimental)