Migrations to one node very slow

[herzkerl]

I'm sometimes seeing migrations slow down for some reason. This time I turned on maintenance mode on one node—the first few VMs migrated within minutes (avg. speed around 130 MiB/s), but there are other migrations that hover around 50-200 KiB/s.

Any ideas what could be the culprit here? The migration network isn't used for anything else.

Edit #1: I've changed the 'maximal workers/bulk-action' setting from 4 to 5 and the fifth migration also finished within minutes (193 MiB/s)—while the other 4 migrations didn't get faster.

Edit #2: When I cancel a migration, the new migration job for these particular VMs will still be as slow as before.

Edit #3: This only seems to be the case when migrating to node1.

 

[hellcry]

same issue no idea what is going on ...

 

[UdoB]

same issue no idea what is going on ...

Mmhhh... no idea if you expect an answer at all...

If you would like to get help you need to give us some information we can work with. The more details you post the higher the chance for a helpful reply ;-)

Start with describing your setup in a few plain sentences and then add configuration data for the used hardware, the kind of storage used on the source, the storage on the destination, the network setup and so on...