On 03/15/2012 05:22 AM, Vladislav Bogdanov wrote: > 15.03.2012 01:49, Andreas Kurz wrote: >> On 03/14/2012 08:40 AM, Vladislav Bogdanov wrote: >>> Hi, >>> >>> I'm observing a little bit unintuitive behavior of migration logic when >>> transition is aborted (due to CIB change) in the middle of the resource >>> migration. >>> >>> That is: >>> 1. nodea: migrate_to nodeb >>> 2. transition abort >>> 3. nodeb: stop >>> 4. nodea: migrate_to nodec >>> 5. nodec: migrate_from nodea >>> (note: no stop on nodea) >>> >>> While I expect migration operation pair to be "more atomic": >>> 1. nodea: migrate_to nodeb >>> 2. transition abort >>> 3. nodeb: migrate_from nodea >>> 4. nodea: stop >>> 5. nodeb: migrate_to nodec >>> 6. nodec: migrate_from nodeb >>> 7. nodeb: stop >>> >>> Is the current behavior intended? >> >> You mean that a migration is rolled-back due to a transition abort -- >> depending on its progress? I think that is the defined (and intended) >> behavior since quite a long time ... maybe Andrew likes to comment on that? > > RA is very fast, it mostly operates on a pseudo-resource, so migrate_to > should be finished somewhere near transition abort (which is caused by > another resource which starts in the same time and modifies CIB). > > And I do not see a roll-back (what can it mean?), I just see that > migration is broken in the middle.
Roll back like: migrating a group with several resource, some are already migrated -- transition abort -- already migrated resources are migrated back or to another node. Regards, Andreas > > Best, > Vladislav > > _______________________________________________ > Pacemaker mailing list: Pacemaker@oss.clusterlabs.org > http://oss.clusterlabs.org/mailman/listinfo/pacemaker > > Project Home: http://www.clusterlabs.org > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf > Bugs: http://bugs.clusterlabs.org -- Need help with Pacemaker? http://www.hastexo.com/now
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