On Sat, May 22, 2010 at 10:44:37PM -0700, Dean Patterson wrote: > Hello Digimer, > > >From what I gathered, corosync is a subset of openais meant for > >situations that do not require the full openais standard. They are > >the communications layer for pacemaker. I am using drbd so > >corosync is the layer between drbd and pacemaker that gives me the > >cluster resource management. Any corrections to this would be > >great as I am also still learning, but I think this is the gist of > >it.
It depends on what version of "openais" we are talking about. Let me explain, and Steve can chime in with further clarification if needed. In the past (pre 1.0 release) there was just openais. It contained executable code, an implementation of TOTEM, a handful of SA Forum services. etc. During the development phase of corosync/openais 1.0, the old "openais" project was split into two new projects: 1. Corosync - the executables code, TOTEM implementation, CPG, etc. 2. OpenAIS - only SA Forum services (ie. CKPT, LCK, MSG, etc.) In its present form (1.x), openais is just a collection of libraries that implemented SA Forum services. These libraries can be loaded and used within corosync. Thus openais depends on corosync. I think the confusion comes from the fact that the "old" openais (pre 1.0) is all inclusive -- it contains everything. Yet when the project split, openais kept its name. Does this make sense? Ryan > On May 22, 2010, at 7:29 PM, Digimer wrote: > > > Hi all, > > > > I've been teaching myself about clustering (mainly using Red Hat's > > cluster suite). I've gone through most of the options in openais.conf > > and I think I've got a handle on it now. > > > > Where I am left wondering is the relationship of corosync and > > pacemaker. Neither seem to be part of RHEL/CentOS, so I've not come > > across anything describing what exactly they provide. > > > > Would someone mind explaining what exactly corosync and pacemaker are > > and how they relate to openais? Their websites seem to cover how to > > install them but less on what they actually do. > > > > Thanks! > > > > -- > > Digimer > > E-Mail: li...@alteeve.com > > AN!Whitepapers: http://alteeve.com > > Node Assassin: http://nodeassassin.org > > _______________________________________________ > > Openais mailing list > > Openais@lists.linux-foundation.org > > https://lists.linux-foundation.org/mailman/listinfo/openais > > _______________________________________________ > Openais mailing list > Openais@lists.linux-foundation.org > https://lists.linux-foundation.org/mailman/listinfo/openais _______________________________________________ Openais mailing list Openais@lists.linux-foundation.org https://lists.linux-foundation.org/mailman/listinfo/openais
