[DRBD-user] Regarding Best way for snapshotting with ZFS/LVM as backing disk for drbd

[Chitvan Chhabra]

Many Thanks for your valuable insights.

On Wed, 17 Aug 2022 at 00:48, David Bruzos <david.bruzos at jaxport.com> wrote:

> Hello,
> Yeah, I agree with what others in this forum have said. My own experiences
> have been about the same. As long as you have a well-synchronized clock on
> your storage nodes and your cron/fcron/whatever scheduler is working
> correctly, you will do very well with internal metadata and
> zfs-auto-snapshot with little fuss.
>
> One thing though, I have only used the A protocol when I need max
> performance and don't care about the data all that much. For 99% of my use
> cases, I've used the C protocol. The A protocol can result in significant
> data loss in many cases when your system crashes while the storage is in
> heavy use. Maybe you could consider using C instead of A if your
> performance is enough and leave A for specific cases where you know it is
> ok.
> Also, in many cases where C has too much latency and A is too risky, you
> can use the B protocol which is the middleground between the two.
>
> --
>
> Thank you,
>
> David
>
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