What is the optimal LUN size to be provisioned in EMC VMAX3 for VmWare 5.5 and above ?.
Like everything else in technology, it depends. You have two methods for determining LUN size within vSphere: the Adaptive Method and the Predictive Method - vSphere Documentation Center
What it all comes down to: what is the required performance of the workload(s), what is the criticality of the workload(s) and what is the required capacity of the workload(s) and are you using RDMs, Passthrough or Datastores?
You will generally see VMAX LUNs provisioned for vSphere ranging in size from 1TB to 4TB for Datastores.
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