Measure disk performance
 

Hello everyone.

Can someone help me find a tool to measure disk performance?

The situation is :

Redhat 7.3 running Lotus Domino. We have a mirrored disk set (raid 1)containing the swap file and the transactional logs from Domino.

I believe the disk set is overworked and is causing the system to slow down. But, how do I prove this to my manager and justify some more disks?

I've looked at the usual tools - df, free, top but none seem to do what I want. Which is to provide data on the work being done, so how many writes/second to swap file | transactional log.

Any ideas ?

You can use hdparm b/c you probably already have it

hdparm -t /dev/drive

or bonnie. Bonnie is much more accurate. You can get it here
http://filewatcher.org/sec/bonnie.html or there might a
package available for your system.