VI3 "Datacenter" size recommendations

[Mizzou_RobMan]

Does anyone have any input as to the size of datacenter they are using and why? I've read people are using 7-9 ESX hosts per datacenter, but was curious if there were other recommended sizes?

[Milton21]

Think it would depend on how many VM's you have.

[Mizzou_RobMan]

155 VMs

[Milton21]

I run 75 VM's on 3 ESX servers with a total of 3 MSAs. No performance problems. But keep in mind each of my esx servers have 32 GB of ram a 2X quad core cpus. With 155 It would depend on memory of each system cpu access stuff like that. A good guide might be to use the HP size tool http://www27.compaq.com/SB/VMware/UI/index.aspx

[MR-T · Accepted solution]

A single instance of VC can manage around 150 hosts or 1500 VM's with VC 2.5, so actual datacenter objects within VC shouldn't come into it.

[Mizzou_RobMan]

True; however my concern is scsi errors/reservations. We allow all ESX hosts to see all LUNs.

[Milton21]

ESX supports up to 256 LUN's. So you should be o with this as well