Yo Duncan! On Fri, 28 Jun 2013 00:20:45 +0000 (UTC) Duncan <1i5t5.dun...@cox.net> wrote:
> > I have around 30 RAID1 sets in production right now. Some of them
> > doing mostly reads and some mostly writes. Some are HDD and some
> > SSD. The RAID sets are pushed pretty hard 24x7 and we watch the
> > performance pretty closely to plan updates. I have collectd
> > performance graphs going way back.
>
> So you're basically confirming it with normal usage as well, but have
> documented performance history going pretty well all the way back.
> Not the simple test script I was hoping for, but pretty impressive,
> none-the- less.
I find that 'hdparm -tT', 'dd' and 'bonnie++' will match up pretty well
with what I see in production. Just be sure to use really large test
file sizes with bonnie++ and dd. dd also needs a pretty large block size
(bs=) and pretty large/fast source of bits when writing.
With bonnie++ you can easily see the speed differences between raw disks
and various RAID types.
RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
g...@rellim.com Tel:+1(541)382-8588
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