At the end of the day, it TOTALLY depends on your needs. raidz may be the best bet for you if you simply do not need the speed of mirrors, and as another user mentioned, it DOES offer better fault tollerence. Figure out what your needs are for your workload THEN ask.
These type of loaded questions will ALWAYS get the same answers. On Wed, Sep 16, 2009 at 10:39 AM, <en...@businessgrade.com> wrote: > Quoting David Magda <dma...@ee.ryerson.ca>: > > On Wed, September 16, 2009 10:31, Edward Ned Harvey wrote: >> >>> Hi. If I am using slightly more reliable SAS drives versus SATA, SSDs >>>> for both L2Arc and ZIL and lots of RAM, will a mirrored pool of say 24 >>>> disks hold any significant advantages over a RAIDZ pool? >>>> >>> >>> Generally speaking, striping mirrors will be faster than raidz or raidz2, >>> but it will require a higher number of disks and therefore higher cost to >>> get the same usable space. The main reason to use raidz or raidz2 >>> instead >>> of striping mirrors would be to keep the cost down, or to get higher >>> usable space out of a fixed number of drives. >>> >> >> And if you want space /and/ speed, then ZFS' hybrid storage pools is >> something worth looking into. >> >> >> This is precisely my point. If I'm taking the hybrid approach - what > advantages do mirrored pools hold over RAIDZ? > As I mentioned, a large amount of RAM, and SSD's for both L2arc and ZIL. > > > > -------------------------------------------------------------------------------- > > This email and any files transmitted with it are confidential and are > intended solely for the use of the individual or entity to whom they are > addressed. This communication may contain material protected by the > attorney-client privilege. If you are not the intended recipient, be advised > that any use, dissemination, forwarding, printing or copying is strictly > prohibited. If you have received this email in error, please contact the > sender and delete all copies. > > > > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss >
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