> -----Original Message----- > From: Dejan Muhamedagic [mailto:[EMAIL PROTECTED] > Sent: segunda-feira, 21 de Abril de 2008 14:09 > To: [EMAIL PROTECTED]; General Linux-HA mailing list > Subject: Re: [Linux-HA] (no subject) > > Hi, > > On Sun, Apr 20, 2008 at 06:20:50PM +0100, Rodrigo Pereira wrote: > > Hello, > > > > On he linux-HA site we can read the following warning about > the Xen OCF: > > > > " > > Memory management race conditions > > > > In case there is more than one Xen node started on a node > at the same > > time, it can happen that race conditions occur in the > calculation of > > free memory, and the memory will in the end not be enough > to start all > > domU's, which will result in a fatal resource startup failure. > > Therefore you should create orders between the Xen resources. The > > orders should be symmetrical=0 and have a score=0. > > " > > > > I ask: having the multiple xen nodes inside of a collocated and > > ordered group, wouldn't that achieve the same effect? > > Yes, because the ordering would ensure that all xen resources > are invoked serially. The comment above states the minimum > requirements. >
Tks. Actually while experimenting i discovered it is a bad idea. If i stop the first resource, the rest will stop too. Not good. So basically the group is usefull only for other constraints. I suppose i can keep the group (usefull for other constraints), but unordered, and then have separate order constraints between the VM's. Or having those resources inside an unordered group could have the effect of not honouring the separate order constraints for them? thx. > Thanks, > > Dejan > > > Thx. > > > > _______________________________________________ > > 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
