We have a vSphere Metro Cluster configured with active/active on peer persistent 3PAR's. From a storage perspective we're continuously available (pretty much).
If I understand this correctly, when enabling Fault Tolerance, the secondary VM by default resides on a datastore and any IO is mirrored to this secondary VM. As we're Metro we have storage availability.
Is it possible to disable the IO mirroring and just have the CPU/RAM failover, letting the Metro Cluster handle the FT side of things? Or do we have to effectively have a mirror of the data on SAN (active/active) and then another mirror of that data on the FT VM's.
vSMP FT is explicitly not supported in a stretched environment.