Rich Braun wrote:
It's 2014 and I figured that maybe the state of the art in RAIS (true clustering of servers vs. disks) might have gotten somewhere since the last time I looked at the idea in about 2011.
There's no such thing. The only major implementation of paired (mirrored) processing that I'm aware of is Tandem's NonStop product now sold by HP. It's not inexpensive.
The next closest thing is, well, nothing, really. Nobody's done tight clustering with active process migration since VMScluster and TruCluster, a port of VMScluster to Tru64 UNIX.
Synchronous transaction processing like Galera isn't the same thing. Nor is live VM migration.
You can get something usable on the cheap with Xen: automate checkpoint file creation, use DRBD to replicate checkpoint data from hot to cold, use a heartbeat or manual switch to toggle nodes between hot and cold states. You'll still lose anything between the fault and the most recent checkpoint but that's what you get for cheap. Zero data loss and zero down time is costly.
-- Rich P. _______________________________________________ Discuss mailing list [email protected] http://lists.blu.org/mailman/listinfo/discuss
