On 1/12/2012 7:17 PM, David Teigland wrote: >>> It's a free-for-all without a list of allowed nodes. >> >> I think i can understand your use case here, but my question is why is >> quorum in charge of that? > > My point here is not about quorum (although this helps us when we do talk > about quorum.) This is just about defining what the cluster is. I understand what you want, but what I don´t understand is how it helps quorum (see below). > >> Remember that this is not cman and that cman >> had 2 functions, one of membership management (that's the one you are >> really looking for, by allow/disallow a node) and quorum (calculated >> after membership management has kicked in). > > Right, both are important. > >>> Maybe that's an important point that we've not drawn out yet. The list of >>> nodes also operates as a "permission list". Any node that's not listed >>> cannot join the cluster. I don't need to worry about some random or old >>> node coming along and intruding. >> >> If anything, this has to happen either before quorum (at totem level or >> in between), or at a much higher level (application that care do it >> basically) since corosync doesn't really care, nor does pacemaker or the >> quorum module. > > I'm trying to make the argument that a node list is a good thing by > itself, apart from the benefits it has for quorum. Same here.... I am not arguing that your point is valid or not (nodelist, membership management etc). What I don´t understand, and that makes me think that I am missing a use case, is (always put aside one second the expected_votes use case, we discussed at length and we don´t disagree there): why is a nodelist *technically* important for quorum? how does quorum benefits from this list? how should this list be used by quorum? In several emails you write that the list is important/vital/etc. for quorum, but I am not getting it.. i simply don´t understand what you are trying to communicate me and I´d really like to understand and in case fix the code. Fabio _______________________________________________ discuss mailing list discuss@xxxxxxxxxxxx http://lists.corosync.org/mailman/listinfo/discuss
