disk i/o

Duncan Morgan dmorgan at gmi-mr.com
Tue Jun 18 18:35:00 CDT 2002


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?


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