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.
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