Re: NetApp NFS vs. ZFS and NFS for Maildir

On 11/03/2016 14:58, Juan Bernhard wrote:

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Someone has experiences with ZFS and NFS(v3) in high load environments?

Thanks

Be careful to no do any synchronous writes under ZFS.

By default all NFS writes are synchronous but I assume dovcot sync writes all data anyway so in this case the NFS sync doesn't matter.

Every sync write can take up to 3 seconds of latency (under freebsd, I didnt test ZFS in linux).

sync writes should take a few ms (they do for me). If you have enough load for them to be a problem you should have enough revenue to afford an SSD as a ZFS write cache / SLOG and then they will no longer be a problem.