On Fri, Feb 22, 2013 at 11:39 AM, Andrew Beekhof <and...@beekhof.net> wrote: > On Fri, Feb 22, 2013 at 1:40 AM, Donald Stahl <d...@blacksun.org> wrote: >>> No. >>> >>> [quote] >>> If you say "colocate A with B" and there is nowhere B is allowed to >>> run, then A wont be allowed to run either. >>> But once the cluster has figured out where they go, it doesn't stop >>> them being started in parallel. >>> [/quote] >>> >>> in this case, A = OraListener1 and B = OraBin1 >>> >>> You only get the "Start A then start B" part by adding the ordering >>> constraint. >> >> I'm not sure I understand where the "sequential" option comes into >> play with a colocation set then. >> >> Or to put it another way- I'm not sure what practical difference there >> is in these examples: >> >> http://clusterlabs.org/wiki/FAQ#Collocation_Sets
I've added some more text to that link, hopefully it provides some additional clarity. >> >> colocation myset inf: app1 app2 >> colocation myset inf: ( app1 app2 ) > > I'm pretty sure the latter doesn't do anything (bad choice of defaults > by the crmsh) because the set isn't colocated with anything. > > You'd need something as well as the set for it to make sense, eg. > > colocation myset inf: app0 ( app1 app2 ) > >> The first seems to say that app1 is dependent on app2 being able to >> run somewhere. >> >> Does the second one simply say that they must not be split up, but if >> only one can run, that's fine? >> >> -Don >> >> _______________________________________________ >> 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 _______________________________________________ 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