Date: Sun, 08 Jan 2012 10:17:43 -0800 From: Dennis Glatting <dg17@penx.com> To: freebsd-fs@freebsd.org, Randy Bush <randy@psg.com> Subject: Re: zfs with a bunch of drives Message-ID: <1326046663.53707.39.camel@btw.pki2.com> In-Reply-To: <m2fwfqur1c.wl%randy@psg.com> References: <m2fwfqur1c.wl%randy@psg.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sun, 2012-01-08 at 10:56 -0500, Randy Bush wrote: > we want to build a new 16-drive RELENG_9 server on which we intend to > run a bunch of vboxen. a couple of years ago, we built a 16-drive > server. based on advice here not to just do a big raidz, it was > configured as eight mirrors > > tank ONLINE 0 0 0 > mirror ONLINE 0 0 0 > label/m00-d01 ONLINE 0 0 0 > label/m00-d00 ONLINE 0 0 0 > mirror ONLINE 0 0 0 > label/m01-d00 ONLINE 0 0 0 > label/m01-d01 ONLINE 0 0 0 > > and so forth. is this still the best advice for performance? > > and is there a url for building a bootable RELENG_9 zfs-only system? > last i looked there were a half dozen all somewhat different. > I would do a performance measurement against a three drive RAIDz with cache verses a simple mirror. Of course performance is based on data but I've found RAIDz a better performer than RAID5 on blocky I/O, which I /think/ is the type of I/O you'd see under vboxen. I've taken data on a simple mirror verses RAIDz/2/3 but I no longer have it. > thanks for clue. > > randy > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1326046663.53707.39.camel>