Good questins. I'm looking forward to doign this at some stage this year or next myself.
Withr egards to performance, tmm itself shouldn't be any slower as the CPU cores themselves are dedicated to a particular tmm instance. IIUC network interfaces (Physical) are shared too. But they come with 10Gb NIC's (2x sfp+'s with a blade) so that hsoluldn't be any more of an issue that sharing the 10Gb links between your core switches (If you're lucky enough for a 10Gb backbone :).
The only thing I'm not confident of is the SSL offload hardware. The encryption hardware is going to be shared between instances. As is the license for it. And I THINK that the license is enforced globally. So if you have qa 500TPS license, and one of your vCMP's bursts 5 SSL negotiations in a 10ms window, you will ikely get license failures in the other vCMP's...
vCMP itself has been out as long as v11... So if you're comfortable with v11, you should feel comfortable with vCMP... But as always, test, test and retest...
H
H