Dne 21.7.2013 13:01, Raymond Jennings napsal(a):
Do snapshots behave the same way as thin volumes wrt discards? On Sun, Jul 21, 2013 at 3:47 AM, Zdenek Kabelac <zkabelac@redhat.com <mailto:zkabelac@redhat.com>> wrote: Dne 21.7.2013 09:10, Raymond Jennings napsal(a): So can thin volumes support discards independently of the device underneath them? I expected fstrim to free space in the thin pool. Yes - you are expecting it correctly. Ignore is mostly usable in case you do not want to free already provisioned space - which might be in certain cases better for performance. But you need to use recent enough kernels and lvm2 tools - since discards support required kernel updates. Kernel: 3.10.1-gento LVM2: 2.02.97 Are these versions recent enough?
Nope - 2.02.98 has fixes for discards - it's been just introduced in 2.02.97 and had some problems - possible those you can observe.
Zdenek _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
