Hi Pedro (again), Did a little reading, and I think I may get it now. Can you please confirm (or correct) the following: 1. Total Order on CloudTM provides "GMU Update Serializable" /* supports PHANTOM_READ intolerant transactions */ 2. Total Order on Infinispan (Nuclear Penguin 5.3ALPHA build) does not (yet) provide "GMU Update Serializable" /* cannot (yet) execute PHANTOM_READ intolerant transactions */ THanks! Ben