NetApp NFS vs. ZFS and NFS for Maildir

[Juan Bernhard]

El 11/03/2016 a las 11:22 a.m., Alessio Cecchi escribió:
> Hi,
>
> I'm evaluating to switch from NetApp to a ZFS appliance (like Qsan). Our
> setup is Dovecot, Maildir for email storage and NFS to share mailboxes
> (more than 30k users) across POP/IMAP and MX servers.
>
> NetApp NFS works fine also under high load but have some limitation for
> inode numbers per Volume and is expensive (but recently their prices
> have dropped).
>
> ZFS, I read, suggest to create many small Raid Group to increase IOPS,
> but this configuration (N Raid instead of one RAID-DP like NetApp) is
> more complex to manage, or not?
>
> Someone has experiences with ZFS and NFS(v3) in high load environments?
>
> Thanks

Be careful to no do any synchronous writes under ZFS. Every sync write 
can take up to 3 seconds of latency (under freebsd, I didnt test ZFS in 
linux). Im using it in a 3k user environment and works great with a 4TB 
raid 10, and dovecot cache files in a SSD disk.

Saludos, Juan.