TomHowarth
Leadership
Leadership

there are a number of reasons to split clusters the link to Duncans blog highlight them from a technical view point, if you are not using Blade technology then I would not bother spliting.

Another major reason is license compliance,  as the other poster says, this is usually for a Oracle Cluster.

by spliting up your environment you will be reducing your overall resources as you will need to introduce more failover hosts,  currently you have two hosts assigned for failover purposes,  if you split into three seperate Clusters then there will be a requriement for an extra host to be assigned as a failover host.

overall this seem a waste of resource.

you say that your environment is looking at larger VM's  this is just a capacity planning exercise,  I would continue your arguement, as you are on the right lines.

Tom Howarth VCP / VCAP / vExpert
VMware Communities User Moderator
Blog: http://www.planetvm.net
Contributing author on VMware vSphere and Virtual Infrastructure Security: Securing ESX and the Virtual Environment
Contributing author on VCP VMware Certified Professional on VSphere 4 Study Guide: Exam VCP-410