3 ms·
Actually.. If you had all of the instance data stored on a fast SAN, so that it was available to all of the hosts simultaneously (possible.) And you had an ul
by devopstom 14y ago
Actually..
If you had all of the instance data stored on a fast SAN, so that it was available to all of the hosts simultaneously (possible.)
And you had an ultra-high speed interconnect (40Gbit Infiniband would do) between hosts, for sharing the memory state when you migrate..
4GB of memory, at 40Gbit/s would be transferred in 0.8s. (assuming perfect throughput, all cows are spherical, etc..)
- accountoftheday 14y agoActually... you do not need that fast a network. You can converge state incrementally rather than transfer it in one go. Xen and VMware do this. Surely the cost of a fast SAN and interconnect would quickly outpace the (imho minor) savings from smaller memory allocations.
- devopstom 14y agoYeah, you can do that too..