Best practices for ZFS setup for a strictly SSD based system?
kraduk at gmail.com
Wed Feb 10 10:15:19 UTC 2016
Dont forget alignment and ashift. You may also want to test compression as
well. IF you have spare cpu cycles I would imagine the systems cpu will
handle it faster than any onboard ssd compression. Benchmarking would be of
use here though.
On 9 February 2016 at 15:54, Patrick M. Hausen <hausen at punkt.de> wrote:
> Hi, all,
> while there is quite a bit of documentation on how to improve ZFS
> by using a combination of rotating disks and SSDs, I have not found much
> an SSD only setup.
> We are planning to try a hosting server with 8 SATA SSDs with ZFS. Things
> I am
> not at all sure about:
> * Does the recommended limit of 6 disks for a RAIDZ2 still
> hold? 2x 4 disks is quite a bit of overhead, could I use all 8
> in one vdev and get away with it?
> (The maximum of 6 recommendation is in some old Sun doc)
> * Will e.g. MySQL still profit from residing on a mirror
> instead of a RAIDZ2, even if all disks are SSDs?
> * Does a separate ZIL and/or ARC cache device still
> make sense?
> Any pointers or direct help greatly appreciated. Or should I take this to
> Thanks and best regards,
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