I am trying to look at how the performance is on the disk subsystem and I am focusing on the read/write requests and also total issued commands against VMFS/LUN.
But when I am trying to look at the VMFS/LUN volumes within Datastores all I get listed is only the VM's , I can not see the total I/O for that VMFS/LUN ? Is it possible ?
I can see the VMFS/LUN performance when I am looking at the ESX server level , but I supposte that it is only performance for that ESX and not the total for all I/O against that datastore ?
And then I am wondering how to interprete the values for the read/write requests and issued commands ? Is it the same "sum-up" period when you are looking at past-hour/past-day/past-week/past month/ ?
For example , when you are looking through VC performance view I now that "real time" mens 20s intervals , so you have to divide read/write requests value with 20 to get the value per second , how do you do that in Monitor ?