On Mon, 23 May 2011, Rudi Ahlers wrote: *snip*
ZFS can use a SATA, SAS or SSD drive as cache drive to speed up common reads & writes. I have seen some small improvements even when using a cheaper grade SATA & SAS drive (as part of an experiment). The speed improvement is quite a bit more evident on larger storage arrays.
You could also use 2 cheaper MLC type SSD's, one in a "cold standy" type setup - where it's already in mounted in the server and then you simply tell ZFS to stop using SSD1, and start using SSD2 instead.
Here's a follow on link from another posters link:
http://www.tomsguide.com/us/ssd-value-performance,review-1455.html
Apparently, SLC are supposed to last ~10x longer than MLC ?
Keith
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