I need to automate placement of vCAC provisioned VMs. I want to automate based on choosing the datastore with the most free space. Should I do this by using automated SDRS storage clusters, or should this logic for choosing a datastore with free space be in VCAC or in VCO?
The easiest would be using SDRS clusters. Do you have more specific logic or behavior that SDRS clusters don't address? If so, vCO would be your best option.
The only issue I've heard of is with vCNS. Grant addresses this here vCAC, vCNS and Datastore Clusters Gotcha