On Fri, Mar 19, 2010 at 5:32 AM, Chris Dunbar - Earthside, LLC < cdun...@earthside.net> wrote:
> if I went with two? Finally, would I be better off with raidz2 or something > else instead of the striped mirrored sets? Performance and fault tolerance > are my highest priorities. > Performance and fault tolerance are somewhat conflicting. You'll have good fault tolerance and performance using a wide raidz3 stripe, eg: 12-disk raidz3 with a spare. You'll have the best fault tolerance using small raidz3 stripes with a spare, for instance 2 x 6-disk raidz3. This uses 50% of your disks for redundancy. You'll have slightly better performance and slightly worse fault tolerance using raidz2 instead in both cases above. I would not recommend using raidz, as it will offer almost no real fault tolerance with the size of drives you're using. You'll have your best performance and fault tolerance using 3-way mirrors, but you sacrifice 2/3 of your disks to do it. Actually, I think that raidz3 is higher tolerance still, but the performance difference will be huge. 2-way mirrors is slightly worse for fault tolerance (below raidz2 I believe) and good performance. -B -- Brandon High : bh...@freaks.com
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