On 21/06/16 10:57 AM, Dmitri Maziuk wrote: > On 2016-06-20 17:19, Digimer wrote: > >> Nikhil indicated that they could switch where traffic went up-stream >> without issue, if I understood properly. > > They have some interesting setup, but that notwithstanding: if split > brain happens some clients will connect to "old master" and some: to > "new master", dep. on arp update. If there's a shared resource > unavailable on one node, clients going there will error out. The other > ones will not. It will work for some clients. > > Cf. both nodes going into stonith deathmatch and killing each other: the > service now is not available for all clients. What I don't get is the > blanket assertion that this "more highly" available that option #1. > > Dimitri
As I've explained many times (here and on IRC); If you don't need to coordinate services/access, you don't need HA. If you do need to coordinate services/access, you need fencing. So if Nikhil really believes s/he doesn't need fencing and that split-brains are OK, then drop HA. If that is not the case, then s/he needs to implement fencing in pacemaker. It's pretty much that simple. -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? _______________________________________________ Users mailing list: Users@clusterlabs.org http://clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org