How to/tools for, recording Disk latency

[Stu_McHugh]

I'm trying to troubleshoot a disk latency problem. I'm using ESXTOP and the turning on the disk-latency options and watching it in real time.

Is there any tools that I can run where it will poll the server erery 30 sec's or so and map it in a graph for me? I can't find if VMKtree does or not?

Any suggestions for this type of trouble shooting?

Many Thanks

[benma]

Take a look at iometer its a very powerfull tool

[Stu_McHugh]

I've seen that tool but not used it yet. I was hoping for something that might record disk latency info so I can refer back to it after an incident.

Any other idea's?

[benma]

If you want to monitor the hole day you can run esxtop / resxtop in batch mode -b

create a configfile that only checks ur disks. Do not set a small refresh rate and

be aware of a large output file.

You can also use den API in Scripts e.g Perl to access your performace counters.

[Stu_McHugh]

Have you got a an example or documentation to run esxtop in batch mode.

[benma]

u run esxtop in the batchmode with the -b parameter

For example: esxtop -b > /tmp/esxtop.csv

For help press "h" in esxtop