Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi Florian, My bad for my first email. I meant "You recommend the use of *Heartbeat* over OpenAIS / Corosync" (combined with Pacemaker). The explanations are quite clear :-) I am working on a two-node cluster with DRBD, Pacemaker. I guess I will follow your advices and go for Heartbeat as the messaging layer. Thank you and I stay tuned for any updates from LINBIT regarding Heartbeat. Cheers, Romain 2009/11/17 Florian Haas <florian.haas at linbit.com> > On 2009-11-17 09:47, Stefan Seifert wrote: > > On Tuesday, 17. November 2009, Florian Haas wrote: > > > >> In contrast, OpenAIS/Corosync has two issues which are likely to affect > >> specifically DRBD based 2-node clusters, and happen to be largely > >> irrelevant for larger or non DRBD based clusters: > >> > >> - redundant rings are suffering from breakage; > >> - cluster messaging does not support unicast. > > > > Also it would seem that OpenAIS does not support serial links between > nodes > > which makes it a NOGO for me. After years of being indoctrinated (for > example > > by you :) that having several independent communication paths is > mandatory, I > > just cannot go back that easily. > > Yes, having several independent comm paths is a good idea, and as I said > OpenAIS/Corosync is currently lacking in that regard. However, we > definitely do advise *against* using serial links for cluster > communications, and have done so ever since we started recommending > using Heartbeat 2.x in CRM mode. > > With Heartbeat and Pacemaker, just as with Heartbeat 2.x with built-in > CRM, don't use serial links. Use redundant network links. Serial links > will break once your CIB reaches a certain size, and the cluster manager > decides it must push a full CIB across the wire. > > Cheers, > Florian > > > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20091117/f3619ce6/attachment.htm>