On Fri, Aug 13, 1999 at 01:28:12PM -0400, James Manning wrote:
> s/w raid5 over 10 raid0's of 2 drives each (64k h/w stripe size)
>
> chunk size of 64k, -b 4096 -R stride=16
...
Great you're posting more numbers !!
If you will be able to benchmark on that system for a little while yet to come,
it would be very interesting to see the performance differences between the
latest 2.2 and 2.3 kernels. I assume you're running 2.2 (?)
The 2.3 kernels should do significantly better on writes, especially on SMP
boxes, or so people think... There haven't been many real numbers yet, well
none I've stumbled over anyway.
If you feel like being a total hero :) you could benchmark 2.0.37, 2.2.11 and
2.3.13, and cross-post the results to linux-raid and linux-kernel, I'm sure
that'd buy you some points both places 8)
As I'm sure you know, you should be prepared to loose whatever data is on those
disks if you choose to mess with 2.3.x.
> Sure looks like smaller s/w chunk sizes win each time... I guess
Curious.
> I'm going to have to drop the h/w stripe sizes. The sync;date;dd;date
> test gave 34.13 MB/sec 1MB block read, 21.33 MB/sec 1MB block write
> (kind of bizarre, but bonnie uses the fs and dd doesn't *shrug*)
What's the difference between SW RAID-0 and HW RAID-0 in your setup
(if you don't mind me asking ;)
Cheers,
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