Comments inline.
Regards,
On Wed, Jun 26, 2019 at 6:12 PM Dmitry Filonov <filonov@xxxxxxxxxxxxxxxxxxx> wrote:
Hi,am really new to gluster and have couple question that I hope will be really easy to answer. Just couldn't find anything on that myself.I did set up replica 3 gluster over 3 nodes with 2TB SSD in each node.To have snapshot functionality I have created thin pool of the size of VG (1.82TB) and then 1.75TB thin LVM inside on each of the bricks.It worked just fine until I scheduled creating hourly and daily snapshots on that gluster volume. In less than 2 days my thin volume got full and crashed.Not refused creating new snapshots, but just died as LVM couldn't perform any operations there anymore.So my first question is how to prevent this from happening. I could create smaller thin LVM, but I still have no control how much space I would need for snapshots. I was hoping to see some warnings and errors while creeating snapshots, but not failed LVM/Gluster.
Newly created snapshots will occupy some data and metadata space in LVM. So the more snapshots you have, the more space will be utilized.
The second question is related but not that important. Is there a way to schedule snapshot removal in cron? gluster snapshot delete requires interactive confirmation and I don't see any flag to auto-confirm snapshot removal.
As of now, No. There isn't any option to schedule a removal of the snapshot. As for auto-confirmation of any command in gluster, '--mode=script' at the end of the command should work.
Although, there is a snapshot config option "auto-delete" which, when enabled, will delete the oldest snapshot after crossing the snap-max-soft-limit (which is a set percentage of the snap-max-hard-limit).
# gluster snapshot config
Snapshot System Configuration:
snap-max-hard-limit : 256
snap-max-soft-limit : 90%
auto-delete : enable
activate-on-create : disable
Snapshot Volume Configuration:
Volume : <volname>
snap-max-hard-limit : 256
Effective snap-max-hard-limit : 256
Effective snap-max-soft-limit : 230 (90%)
Usage:
snapshot config [volname] ([snap-max-hard-limit <count>] [snap-max-soft-limit <percent>]) | ([auto-delete <enable|disable>])| ([activate-on-create <enable|disable>])
snapshot config [volname] ([snap-max-hard-limit <count>] [snap-max-soft-limit <percent>]) | ([auto-delete <enable|disable>])| ([activate-on-create <enable|disable>])
_______________________________________________Thank you,Fil--Dmitry FilonovLinux AdministratorSBGrid Core | Harvard Medical School250 Longwood Ave, SGM-114Boston, MA 02115
Gluster-users mailing list
Gluster-users@xxxxxxxxxxx
https://lists.gluster.org/mailman/listinfo/gluster-users
_______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx https://lists.gluster.org/mailman/listinfo/gluster-users
