disk i/o

Arjan Van de Ven arjanv at redhat.com
Wed Jun 19 04:40:01 CDT 2002


On Tue, Jun 18, 2002 at 04:36:08PM -0700, Duncan Morgan wrote:
> Hello,
> 
> can anyone tell me what are good numbers to shoot for when tuning disks
> i/o?. Specs for the server are this:
> 
> - Dell 6450
> - quad 700 MHz Xeon processors
> - 2 GB RAM
> - 4 x 36 GB Ultra 3 SCSI drives
> - AMI Megaraid
> - Linux Red Hat 7.2 w/ 2.4.9-34smp redhat kernel
> 
> I did some benchmarking with a tool called 'hotio' and got write throughput
> of average 35 MBytes/sec and read throughput of average 381 MBytes /sec.
> These seem like reasonable numbers compared to other servers I have
> benchmarked bit I'm not sure. Is there a more accurate testing tool I can
> use? Are these numbers in fact good?

tiobench.sourceforge.net
is pretty good in my experience, however with 2Gb ram you need to edit the
makefile to enable "largefile" support




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