They can push updates fast enough[0] that they don't want this to wait after a restart. And since you're bringing software updates into this, even though an op

They can push updates fast enough[0] that they don't want this to wait after a restart. And since you're bringing software updates into this, even though an optimal strategy will target both problems independently: one can't force users to restart without a lot of pain, as long as there isn't true session checkpointing. [0] Thialfi: http://research.google.com/pubs/archive/37474.pdf http://research.google.com/pubs/archive/37474.pdf