Hi Everyone,
I am new to the forum and also to the Virtualization Manager product so I was wondering if you could offer some advice please. One of the things I am using the product for is to try and get an understanding of how our storage is performing (IOPs\Latency) and inturn whether this is effecting individual Virtual Machine performance (IOPS\Latency).
Reviewing the Top-N:Datastore I/O Latency Hour widget none of our datastores are showing any total, or read\write latency values above 20ms, with the highest datastore showing a value of 8.5ms. One of the Solarwinds 2 minute tutorial videos stated that at a datastore level anything below 20ms was generally ok with anything over needing to be addressed so based on this we are in good shape.
However looking at the Top-N:VM Latency Hour widget we have a number of Virtual Machines that are reporting Total and Write Latency much higher than 20ms. My questions are:-
1) Does the 20ms rule generally still apply to Virtual Machine latency (as it does with Datastore latency)? If not what value should we generally benchmark against?
2) If it does, does anyone have any idea why we would see high latency at a Virtual Machine level, in some instances, but not at a datastore Level? Could there be a bottle neck\contention else where that is causing this and if so could you point me in the direction of how this could be confirmed using the solution.
Thanks a lot