On Thu, Nov 25, 2010 at 4:06 PM, Lars Ellenberg <[email protected]> wrote: > On Thu, Nov 25, 2010 at 03:56:26PM +0100, Michael Schwartzkopff wrote: >> On Thursday 25 November 2010 15:51:32 Henrique Fernandes wrote: >> > If it is in standby it still part of cluster and take decisions on quorum >> > and etc ? >> >> yes. > > And it is also still "electable", that is it likely will become DC.
Likely? > > So this is not an answer to the OP's question, > or I misunderstood "electable" in that question. > > "in theory" you should be able to add a node on the membership layer > only (corosync), but not start pacemaker. > > That "should" give you an additional quorum vote, > but obviously won't be able to become DC. > > You could also say "pretty please" to beekhof, not taking part in the DC > election should be a very simple if () statement in the code and one > additional node setting in the cib, something like standby, only "stronger". eventually we'll have non-voting peers, but for now, (as you said) just don't run pacemaker. > > Use case would be to add a weak, small, cheap, maybe even virtual, > node to an otherwise two-node cluster to serve as a quorum tiebreaker. > > It may have not enough power to run resources, and possibly not even > enough to run as DC. Or it may not be reliable enough all by itself to > act as DC, rebooting it should not affect an otherwise healthy cluster > at all etc. Node age is one of the metrics used to elect a DC, if it cant stay up long it's unlikely to be elected. > -- > : Lars Ellenberg > : LINBIT | Your Way to High Availability > : DRBD/HA support and consulting http://www.linbit.com > > DRBD® and LINBIT® are registered trademarks of LINBIT, Austria. > _______________________________________________ > Linux-HA mailing list > [email protected] > http://lists.linux-ha.org/mailman/listinfo/linux-ha > See also: http://linux-ha.org/ReportingProblems > _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
