On 07/18/2016 11:56 AM, Lentes, Bernd wrote: > > > ----- On Jul 18, 2016, at 4:04 PM, Ken Gaillot [email protected] wrote: > > >>> >>> Is there a way to manipulate the scores ? Is the score -INFINITY because the >>> resource is stopped >>> or is the resource stopped because the score is -INFINITY ? >> >> Yes, yes and yes ;-) >> >> You can manipulate the scores in the configuration. The different >> high-level tools (crm, pcs, etc.) have their own syntax for specifying >> scores, but each constraint has a score, and resource stickiness is a >> score. The cluster sums up all the scores that apply to a given resource >> per node, and places the resource on the node with the highest score. >> >> From the cluster's point of view, the resource is stopped because the >> score is negative on all nodes. >> >> However, the crm command's syntax uses "stop" and "start" indirectly. >> "crm stop" (and "pcs resource disable") simply adds constraints with >> negative scores to all nodes, to make the cluster stop the resource. >> "crm start" (and "pcs resource enable") simply removes those >> constraints. So, from the point of view of using crm, "stopping" the >> resource creates the negative scores, which then makes the cluster >> actually stop the resource. >> > > Hi Ken, > > thanks for your help. > > Can i edit them directly ? Or do i have to make a circuit with constraints ?
Constraints are how they are edited. Stop/start aren't used in normal operation, typically only when you're doing some sort of maintenance. Normally, you just leave everything "started", and the cluster starts/stops services as needed. Constraints let you set scores for conditions you desire, such as preferring a more powerful node, keeping two resources together, etc. > Is pcs available for Suse SLES 11 SP4 ? > I searched for it but didn't find it. > Is it a good idea to use pcs because i read crm is deprecated ? No, crm is still actively maintained and fully supported on SuSE. Pcs is used on Fedora/RHEL/CentOS. The two are largely equivalent in functionality; only the syntax is different. > Bernd > > > Helmholtz Zentrum Muenchen > Deutsches Forschungszentrum fuer Gesundheit und Umwelt (GmbH) > Ingolstaedter Landstr. 1 > 85764 Neuherberg > www.helmholtz-muenchen.de > Aufsichtsratsvorsitzende: MinDir'in Baerbel Brumme-Bothe > Geschaeftsfuehrer: Prof. Dr. Guenther Wess, Dr. Alfons Enhsen, Renate > Schlusen (komm.) > Registergericht: Amtsgericht Muenchen HRB 6466 > USt-IdNr: DE 129521671 _______________________________________________ Users mailing list: [email protected] http://clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
