We have a number of ESX Servers connected to various iSCSI Targets and I want to do a consolidation exercise so want to get an idea of the current level of IOPS each of our servers uses.
I tried running
$start = Get-Date "2010-07-25 10:00:00"
$finish = Get-Date "2010-07-26 10:00:00"
$esx = Get-VMHost <ESX-hostname>
get-stat -entity $esx -stat disk.numberRead.summation -start $start -finish $finish
But get the error
The metric counter "disk.numberread.summation" doesn't exist for entity "esx1.zoo.lan"
despite the documentation implying that the counter does exist.
Anyone done anything similar. Even if I can get the data on a per-VM or even per-LUN bassis that would be fine as I could just sum it up in a spreadsheet
Best Answer
if you are running ESX, and not ESXi, you can ssh to the ESX host and run
Press 'u' to get to the storage view, and 'v' to get to the VM view.
Esxtop bible is here: http://communities.vmware.com/docs/DOC-9279
How to log esxtop output is here: http://www.b3rg.nl/blog/blog-it/performance-logging-on-esx-using-esxtop.html