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 <hau...@punkt.de> wrote: > Hi, all, > > while there is quite a bit of documentation on how to improve ZFS > performance > by using a combination of rotating disks and SSDs, I have not found much > about > 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 > freebsd-fs@? > > Thanks and best regards, > Patrick > -- > punkt.de GmbH * Kaiserallee 13a * 76133 Karlsruhe > Tel. 0721 9109 0 * Fax 0721 9109 100 > i...@punkt.de http://www.punkt.de > Gf: Jürgen Egeling AG Mannheim 108285 > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org" _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
