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