I am considering RAIDZ or a 2-way mirror with a spare. I have 6 disks and would like the best possible performance and reliability and not really concerned with disk space. My thought was a 2 disk 2-way mirror with a spare. Would this be the best in terms of performance? Thanks -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20100114/f28441ed/attachment.html>
On Jan 14, 2010, at 11:09 AM, Mr. T Doodle wrote:> I am considering RAIDZ or a 2-way mirror with a spare. > > I have 6 disks and would like the best possible performance and reliability and not really concerned with disk space. > > My thought was a 2 disk 2-way mirror with a spare. > > Would this be the best in terms of performance?A six-way mirror will give you the best read performance and data retention :-) You can trade data retention for write performance by a stripe of 2, 3-way mirrors or 3, 2-way mirrors. -- richard
On Thu, Jan 14, 2010 at 11:31:25AM -0800, Richard Elling wrote:> On Jan 14, 2010, at 11:09 AM, Mr. T Doodle wrote: > > > I am considering RAIDZ or a 2-way mirror with a spare. > > > > I have 6 disks and would like the best possible performance and > > reliability and not really concerned with disk space. > > > > My thought was a 2 disk 2-way mirror with a spare. > > > > Would this be the best in terms of performance? > > A six-way mirror will give you the best read performance and data > retention :-) You can trade data retention for write performance > by a stripe of 2, 3-way mirrors or 3, 2-way mirrors. > -- richardI vote for 2 3-way mirrors. That way you can afford to lose two devices in each vdev before losing your data. Ray