Hi, I'm running a 2-node HA cluster - Xen, Pacemaker, Corosync, DRBD - fairly traditional.
But... I'm getting ready to add a new node or two, and I'm starting to wonder how one might approach 3-node failover - replicating data across three nodes, with two levels of failover for a VM -- which should also make it a lot easier to replace hardware and upgrade software without sacrificing downtime. It sort of looks like DRBD stacking can replicate data across three nodes, but it looks a little baroque, and it's not at all clear how to set up a 3-node failover strategy. It doesn't look like the various configurations provide for the same flexibility in specifying spare nodes, akin to the way that md raid configuration gives flexibility in the number of active and spare drives in an array. Any suggestions, pointers, or comments on how to approach this? Should I be looking at some kind of cluster file system instead of DRBD? Thanks very much, Miles Fidelman -- In theory, there is no difference between theory and practice. In<fnord> practice, there is. .... Yogi Berra _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
