[reacharavindh]

Not OP, but that is my experience. It worked like a rock on a single server. Clustering brought us issues rooting from its complexity. Split brain scenario, corruption of the Mnesia database and such. We went back to single server mode.

[jayd16]

>Mnesia

Is Mnesia just terrible or is there some trick? I did run into issues you're talking about with ejabberd clusters.

[Plugawy]

Same! Never bothered with the so-called HA setup after running a cluster for few months. Making all messages durable + backups of underlying storage are sufficient, while the do not prevent an outage, at least bringing the system back to an operational state is fairly straightforward