El 11/03/2016 a las 12:04 p.m., Charles Marcus escribió:
On 3/11/2016 9:58 AM, Juan Bernhard <j...@inti.gob.ar> wrote:
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.
From what I've heard you should not use hardware based RAID (ie, RAID10)
setups with ZFS, you should let ZFS handle it.
Maybe that is the source of your latency issues?
There are actually two ZFS raid1 but in the same zpool, and the SSD in
local, not in the ZFS dtorage. The latency was because I tried to use a
ZFS for datasore of a vmware undres NFS, and NFS under vmware is always
synchronous. I improved 10 times the performance under iSCSI
