VMWare ESX Environment Design
Posted on 2009-05-13
Good Morning All,
I am attempting to redesign our current VMWare environment and was looking for some guidance from some other VMWare experts. Here is out current set-up.
3- HP Blades all running VMWare ESX 3.5 ( Each server has 8 cores with 16GB RAM)
1- Hitachi SAN with 8 LUNS (connected via fibre channel)
2- DELL 2850 both running ESX 3.0 (each has a quad core with 8GB RAM)
Connected to the HItachi SAN (via fibre channel)
1- Virtual Center instance controlling all servers
We just purchased 2- HP Blades (dual Proc Quad Cores with 32GB RAM) and will most likely upgrade 2 of our existing blades to 32GB of RAM. I have 2 questions as to how I should structure the environment with the 2 new servers coming in. I am the new VMWare Admin and the previous Admin and I disagree as to how the environment should be set-up.
A. Should I put all 5 Blades together into 1 big cluster and then split up the environment through resource pools? Currently I have a DEV and PRD resource pool. DEV gets normal resources and a smaller reserve of CPU and RAM and PRD gets higher shares and more CPU and RAM reserved.
B. I could have keep the servers grouped in clusters 3-PRD 2-DEV and then have seperate LUNS for DEV and PRD and then only create resource pools based on high value servers.
The previous admin is worried because we used VCB in the past and had issues. When we ran the nightly backups, we completely clogged our VMWare network and had to ditch that backup option. (2 nics on each blade. One for VM's, the other for the host) He is afraid that with all 5 hosts able to see all available LUNs, that the disk I/O might cause problems on our SAN. Is this something we should worry about?
Thanks for your help everyone. Any and all ideas are greatly appreciated!