> On 20 Jul 2016, at 15:22, Alexis HAUSER <alexis.hau...@telecom-bretagne.eu> > wrote: > >> Use "Clusters" -> "Logical Networks" -> "Manage Networks" for assigning >> network for migrations. It's ovirtmgmt by default. Note that migration >> network has to have IPs on hosts. > > Nice, do you think I should dedicate a link only for migration, for safety ? > > >> Hosts have VDSM configuration option - [vars]/migration_max_bandwidth >> in /etc/vdsm/vdsm.conf. It's 52MB/s by default. So it looks like your >> network is already highly used. > > It's not highly used, it's yet on a 10/100 Mb switch...But it's just > temporary. Anyway it's interesting because it simulates a highly use network, > which can happen. > > >> Your VM migration fails because migration is so slow so it just can't >> migrate without downtime. You can adjust "Use custom migration >> downtime" VM option to make any VM migrated over any network. Please >> note it's a maximal value. Actually it starts with a value 10 times >> lower and increases it automatically. 5000 is good value to start in >> your case. > > Thanks, but it doesn't seem to change anything : I added > max_outgoing_migrations = 1 > migration_max_bandwidth = 5
well this is not going to make it any faster, quite the opposite:) You need to play with the downtime setting (in UI or in vdsm.conf) to affect convergence in your constrained connectivity setup There’s a lot more intelligence in oVirt 4.0 regarding this, so if it’s an option I would recommend to upgrade and change the migration policy to one of the new ones Thanks, michal > in /etc/vdsm/vdsm.conf > on my concerned host, but it still goes to 98% use of network and migration > fail...I restart vdsmd.service but it doesn't seem to change anything. Any > idea ? > _______________________________________________ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users