On Fri, 11 Mar 2016 11:58:00 -0300 Juan Bernhard <juan@inti.gob.ar> wrote:
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.
zfs set sync=disabled ?
-- Regards, Stephan