I think the problem here is that guide is very outdated. Did you see the computer they were using "Dual Pentium Pro 150 MHz"? I bet that was on a 2.2 kernel also so to me any numbers there are meaningless. At work I use 256K or 512K blocks on my 1TB or 2TB raid 5 or raid 6 arrays. My latest server build featured 6 X 320 GB seagate
7200.10 drives in a raid 6 256K clusters for ~ 1.2TB of raid space. With that setup on a Athlon64 M2 3200 system (asus mobo) I get ~260 MB/s on the non cached hdparm benchmark. <br><br>John<br><br><div><span class="gmail_quote">
On 7/6/06, <b class="gmail_sendername">Dean Wilson</b> <<a href="mailto:dean.k.wilson@gmail.com">dean.k.wilson@gmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I know that many of us are interested in Raid, but don't really know<br>the best configuration for a myth setup. I, like many others here, am<br>interested in Raid5, and would like it to perform optimally for (very)<br>large files.
<br><br>I've read <a href="http://www.tldp.org/HOWTO/Software-RAID-HOWTO-9.html">http://www.tldp.org/HOWTO/Software-RAID-HOWTO-9.html</a>, which<br>gets into chunk and block size performance testing, but doesn't use<br>chunks above 32K. I would think that a larger chunk size would be
<br>ideal for myth, as it uses exceedingly large files.<br><br>I figured I'd use bonnie to measure performance gains/losses, since<br>that's what the howto used. Obviously I'll play with different<br>chunk/block size combinations, and will report my findings. But I'm
<br>curious to know if anyone out there would be interested in any other<br>specific tests? If so, let me know -- I'll try to include them, and<br>will put together a web page with the results I find.<br><br>Thanks,<br>~Dean
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