evc enabled cluster is not showing equal resources via tab . click cluster and then host tab.(pic 1)
for instance my new servers are showing only ten percent of cpu usage where my old servers are showing 40 percent of cpu usage.
however if i check the cluster in webclient . it is fully balanced .
why it is not balanced even drs is fully automated.
is it because my new servers are having bigger capacity than old servers - or any other way?
Take in mind that DRS will take action (migrate virtual machines) only if there is resource contention on a particular host... if you want something more balanced, you can configure the DRS migration threshold for something more aggressive.
Thanks Richardson,
I have used the most aggressive DRS settings but still it is showing balanced. but my gen8 are utilizing only 10% of CPUs where gen7 are utilizing 40%.
Hi,
it's not the job of DRS to achieve a fully 50/50 balanced cluster.
It's job is to make sure all VMs can get the ressources they need.
So as your hosts can fully satisfy your VMs, DRS doesn't see a reason to migrate the VMs.
Tim
DRS also considers memory, and from RAM perspective all your servers seem to be moderately loaded and more or less balanced. Most likely moving a VM from one of your G7 hosts to G8 would not really improve anything for that particular VM in terms of CPU resources (it might be getting all it requests already) however it might make memory loads on your hosts more differentiated.
So DRS most likely goes thinking "if a move does not improve anything (we consider VMs) but might make things worse in other areas, why move then?"
vMotion is treated as a fairly "expensive" operation in terms of resources therefore DRS should typically avoid migrating VMs around with no particular reason.
