Perttu wrote:
Hello SmartOS community, long time follower, first time poster here.
What do you guys think are best practices regarding file systems in
KVM Linux guests?
Is it advisable to use ZFS inside guests? Wouldn’t it use double the
memory for the same data?
Or would using something like XFS or ext4 be better and perhaps tuning
them to be more synchronous if crash resiliency is wanted?
We always use ext4, mainly because it's supported for the distributions
and application we run. There's always LX zones if you want to use
native ZFS.
My main concern is data integrity if I snapshot and send the guest
regularly to another host for disaster recovery. Performance is also
important but I do have a slog device (S3700).
KVM disk writes on SmartOS are synchronous, so you will be OK there. I
have done plenty of testing with KVM recover from snapshots and never
had a problem, even with windows guests!
--
Ian.
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