DRS Deepdive  *** These formulas apply only to ESX/ESXi 4.0 and
vCenter Server 4.0. They are subject to change ***  Last week I
mentioned which metrics DRS used for load balancing VMs across a
cluster. Of course the obvious question was when the DRS
Deepdive would be posted. I must admit I’m not an expert on this
topic as like most of you I always took for granted that it
worked out of the box. I can’t remember that there ever was the
need to troubleshoot DRS related problems, or better said I
don’t think I’ve ever seen an issue which was DRS related.  This
article will focus on two primary DRS  functions:    1. Load
balancing VMs due to imbalanced Cluster   2. VM Placement when
booting  I will not be focusing on Resource Pools at all as I
feel that there are already more than enough articles which
explain these. The Resource Management Guide also contains a
wealth of info on resource pools and this should be your
starting place!  Load Balancing  First of all VMware DRS
evaluates your cluster every 5 minutes.