Re: [CentOS] New to VM

David Milholen wrote:

What are some min requirements for Hardware and what performance differences are there in just running another pid for an app?

That question is way too general to answer and also depends a bit on what VM approach (xen/kvm/vmware server, vmware esxi) you use. As a rule of thumb, I'd expect to lose 10% in overall performance and much more than that from disk head contention unless you plan the layout very carefully and spread over independent drives. You can make some (perhaps more than that) back by overcommitting the machines where the load is likely to be bursty and staggered and by having a lot of RAM for better disk buffering.