[Users] Migration failed (previous migrations succeded)

[Markus Stockhausen]

> Von: users-bounces at ovirt.org [users-bounces at ovirt.org]" im Auftrag von "Markus Stockhausen [stockhausen at collogia.de]
> Gesendet: Donnerstag, 30. Januar 2014 18:05
> An: ovirt-users
> Betreff: [Users] Migration failed (previous migrations succeded)
> 
> Hello,
> 
> we did some migration tests this day and all of a sudden the migration
> failed. That particular VM was moved around several times that day without
> any problems. During the migration the VM was running a download.

Found the reason. The memory was changing faster than the copy process
worked. The logs show:

Thread-289929::WARNING::2014-01-30 16:14:45,559::vm::800::vm.Vm::(run) vmId=`ce64f528-9981-4ec6-a172-9d70a00a34cd`::Migration stalling: dataRemaining (19MiB) > smallest_dataRemaining (9MiB). Refer to RHBZ#919201.
...
Thread-289929::WARNING::2014-01-30 16:14:55,561::vm::800::vm.Vm::(run) vmId=`ce64f528-9981-4ec6-a172-9d70a00a34cd`::Migration stalling: dataRemaining (24MiB) > smallest_dataRemaining (9MiB). Refer to RHBZ#919201.
...
Thread-289929::WARNING::2014-01-30 16:15:05,563::vm::800::vm.Vm::(run) vmId=`ce64f528-9981-4ec6-a172-9d70a00a34cd`::Migration stalling: dataRemaining (20MiB) > smallest_dataRemaining (9MiB). Refer to RHBZ#919201.
...

Now I' getting serious problems. During the migration the VM was
doing a rather slow download at 1,5 MB/s. So the memory changed 
by 15 MB per 10 seconds. No wonder that a check every 10 seconds 
was not able to see any progress. Im scared what will happen if I
want to migrate a medium loaded system runing a database.

Any tip for a parametrization?

Markus

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