VMware vSphere offers the ability to divide cluster resources into pools. There have been a lot of outstanding articles about resources. I want to emphasize especially the books written by Duncan Epping, Niels Hagoort and Frank Denneman.
Resource pools are a constant source of misconfiguration. Almost every cluster I see in the wild has some no-go’s configured. The most common reason is that RP are misunderstood as folders to organize VMs.
Do not use Resource Pools as folders
People keep thinking that if they leave all pools at “Normal” it wouldn’t be a problem. In fact it is a problem. Especially if the customer tried to organize his VMs into hierarchical structures, resource pools can become very complicated to track and might do nasty things in times of contention. Continue reading “Rebalance your Resource Pools”