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

[Nicolas Ecarnot]

Le 27/11/2014 11:17, Federico Simoncelli a écrit :
> 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:block-discard,n,z
> (very much experimental)

Thank you Frederico,

This sounds very clever and encouraging.

Would it be possible to imagine see it appear in a future 3.6.? release?

-- 
Nicolas Ecarnot