Michal wrote:
On 24/03/2010 17:14, Freddie Cash wrote:
Yes, that would be helpful (mirrored slogs, until we get slog removal
support).
As would an L2ARC (cache) device in the head node.
As well as lots and lots and lots of RAM.
And as fast of ethernet NICs as you can get between the head node and the
storage nodes.
And, and, and, and ... :)
As far as I know more RAM is more important the fast CPU, so RAM is the
order of the day, and I guess it depends what you think fast CPU is, but
I wasn't planning on a duel CPU or anything top of the range. I have
some duel core's knocking around...
Any modern multicore CPU will be fine. And more RAM you have, the larger
ARC / prefetch will be used (more read speed you will gain)
Michael, I sort of understand what you are talking about with ZIL, but
not completely, so thanks for the pointers, there are clearly things I
have not thought about.
This links can be useful to you
ZFS L2ARC
http://blogs.sun.com/brendan/entry/test
ZFS Evil Tuning Guide
http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide#Disabling_the_ZIL_.28Don.27t.29
ZFS ZIL + L2ARC SSD Setup
http://www.mail-archive.com/[email protected]/msg34674.html
Miroslav Lachman
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