Am Dienstag, 10. April 2007 14:14 schrieb Lars Marowsky-Bree: > > Per-node ordering might be not the right way. Think about the following. > > Four clones on four machines. Machine 3 dies and the first one has to > > take over. 1) Resource 1 is shout down > > 2) Resource 1 is started > > 3) Resource 3 is started. > > > > Between 1) and 2) there is no connectivity for resource 1. > > Uhm. Of course. Machine 3 has just died. Of course there's no > connectivity until it is restarted.
Not really. Not only resource 3 is not available during failover, but ALSO all other resources! That is the problem. To make it clear in the above situation of failure of node 3: 1) resource 4 on node 4 is stopped 2) node 3 is failed 3) resource 2 on node 2 is stopped 4) resource 1 on node 1 is stopped 5) resrouce 1 on node 1 is started 6) resource 2 on node 2 is started 7) resource 3 on node 1 is started 8) resource 4 on node 4 is started The time from 1) to 8) might be several seconds (~10s). During this time resource 4 is not available although it is not affected from failure and no additional resource is started on that node. > But, there also won't be any IP rejects/denied being send, as none of > the other node replies to that specific hash bucket yet. So, it'll look > like a brief delay only. > > > Is would be better just to start resource 3 on node 1. > > That's what happens. If node3 crashed, we obviously don't stop the > resource - that's implied in the node hosting the resource being gone & > fenced. No. In ordered clones ALL resources are stopped on ALL nodes and then started again. Of course the resource of the failed node is started on a new node. This process might last quite long for more than two nodes. Or perhaps I have a mistake in my setup os the ordered clone resource... -- Dr. Michael Schwartzkopff MultiNET Services GmbH Addresse: Bretonischer Ring 7; 85630 Grasbrunn; Germany Tel: +49 - 89 - 45 69 11 0 Fax: +49 - 89 - 45 69 11 21 mob: +49 - 174 - 343 28 75 mail: [EMAIL PROTECTED] web: www.multinet.de Sitz der Gesellschaft: 85630 Grasbrunn Registergericht: Amtsgericht München HRB 114375 Geschäftsführer: Günter Jurgeneit, Hubert Martens --- PGP Fingerprint: F919 3919 FF12 ED5A 2801 DEA6 AA77 57A4 EDD8 979B Skype: misch42 _______________________________________________ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
