On 26 Jun 2003, Gregory Leblanc wrote:
> On Thu, 2003-06-26 at 01:30, Gordon Henderson wrote:
> [snip]
> > So now with important machines which had mirrored or RAIDed disk systems,
> > I always put swap on a mirrored or RAID5d device.
>
> Swap on RAID 5 is going to have pretty poor performance, in general.
> Swap needs to be both high bandwidth and low latency, both for reading
> and writing. RAID 5 just isn't that.
I don't actually care right now - these machines are servers and I really
don't want them to swap - I'd rather run them without swap at all, but
I've yet to see something that'll convince me that this is a good idea,
and anyway.. Bonnie might not be the best thing in disk benchmarks, but..
Version 1.02b ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
red 1G 15418 99 68565 37 31359 24 14286 97 150174 84 390.6 1
is fairly reasonable.
G
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