Hi, I am trying to understand howto implement MMP correctly into a lustre failover cluster.
As far as I understood the MMP protects the same filesystem beeing mounted by different nodes (OSS) of a failover cluster. So far so good. If a node was shut down uncleanly it still will occupy its filesystems by MMP and thus preventing the clean failover to an other node. Now I want to implement a clean failover into the Filesystem Resource Agent of pacemaker. Is there a good way to solve the problem with MMP? Possible sotutions are: - Disable the MMP feature in a cluster at all, since the resource manager takes care that the same resource is only mounted once in the cluster - Do a "tunefs -O ^mmp <device>" and a "tunefs -O mmp <device>" before every mounting of a resource? - Do a "sleep 10" before mounting a resource? But the manual says "the file system mount require additional time if the file system was not cleanly unmounted." - Check if the file system is in use by another OSS through MMP and wait a litte bit longer? How do I do this? Please mail me any ideas. Thanks. -- 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 _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
