I have a vmware cluster, one with 10k disks for OS and the other with 15k disks for OS (both mirrored). I see a huge difference in upload speed with the 15k like double.
All of our data is stored on disk shelfs. So my question is what is the benefit of having fast OS drives for the VMWare kernal operations also when they are clustered in vCenter and one server has 10k and the other 15k.
I'm asking because I may be able to ship faster drives so all servers in the cluster match, but if the VMWare kernel doesn't really do anything since the disk shelfs are handling all IOPs, then I can live without it.