[Gluster-users] snapshots questions

[Dmitry Melekhov]

26.06.2019 16:41, Dmitry Filonov пишет:
> 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.
>
> 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.
>
--mode=script


> Thank you,
>
> Fil
>
> --
> Dmitry Filonov
> Linux Administrator
> SBGrid Core | Harvard Medical School
> 250 Longwood Ave, SGM-114
> Boston, MA 02115
>
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