[linux-lvm] ubuntu xenial + lvmlockd
teigland at redhat.com
Thu Apr 20 15:40:48 UTC 2017
On Thu, Apr 20, 2017 at 11:26:18AM +0200, Charles Koprowski wrote:
> Would you consider the use of lvmlockd + sanlock as "production ready" ?
I believe it will work better than clvmd. There is one main thing, unique
to using sanlock, that you should verify in your environment.
lvmlockd+sanlock is sensitive to spikes in i/o delays. If sanlock sees
several consecutive large i/o delays (> 10 sec each), e.g. during heavy
use from applications, or during path switching, this can trigger spurious
failure detection. (This is analogous to network delays when using
(We can increase i/o timeouts to compensate if really necessary.)
> My goal here is to replace an existing cluster of 5 nodes using clvmd + dlm
> + corosync to access a shared VG of 6 TB containing around 300 LVs.
> The current solution is working fine but I find using dlm + corosync "just"
> for locking a bit overkill.
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