Date: Mon, 2 May 2005 22:30:29 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: <noackjr@alumni.rice.edu> Cc: freebsd-performance@freebsd.org Subject: Re: Very low disk performance on 5.x Message-ID: <00b601c54f5e$2bae23c0$b3db87d4@multiplay.co.uk> References: <19879.1115061648@critter.freebsd.dk><004101c54f57$abc04220$b3db87d4@multiplay.co.uk> <427698F9.8030501@alumni.rice.edu>
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On 5/2/2005 3:43 PM, Steven Hartland wrote:
>> Nope thats 5.4-STABLE this should be at the very least
>> 260Mb/s as thats what the controller has been measured on
>> linux at even through the FS.
>
>Um... not quite. That was the number you listed for S/W RAID5. In that
>case you're not benchmarking the controller in the same way; the
>controller is just serving requests with no RAID processing overhead at
>all. Could you get results for Linux that bypassed the filesystem but
>used H/W RAID5 like you are with FreeBSD?
This is true would need to do the H/W RAID5 test on a raw volume
to be sure that the H/W RAID is not a bottleneck.
Steve
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