[one-users] VM stays in MIGRATE when trying to livemigrate it

Adnan Pasic pqado at yahoo.de
Wed Aug 31 13:33:12 PDT 2011

thanks for your swift response. Unfortunately, it's not that kind of problem. The network isn't slow, since I'm using ONE for my diploma thesis I am writing at the university, so the connection is quite good. Also, the VMs aren't utilized at all, although yesterday it worked even under full utilization. The migration needed some time, but still it finished successfully.
The problem I'm now having appears unfortunately even with the example-ttylinux-VM, so it has to be something else! :-/

-----Ursprüngliche Nachricht-----
Von: Steffen Neumann [mailto:sneumann at ipb-halle.de] 
Gesendet: Mittwoch, 31. August 2011 22:29
An: Adnan Pasic
Cc: users
Betreff: Re: [one-users] VM stays in MIGRATE when trying to livemigrate it

On Wed, 2011-08-31 at 21:40 +0200, Adnan Pasic wrote:

> However, now when I try to migrate or livemigrate any deployed VM,
> this VM stays in SAVE or MIGRATE respectfully. Nothing else happens.

For live-migration: Is the VM quite busy ?

During live-migrate the RAM is synch'ed over to the new node,
until nothing changes anymore. So if 1) your network is slow-ish
(say, 100Mbit) and/or 2) you have one or many processes running 
within the VM which alter RAM, then the sync'ing can't keep up 
with the changes, hence the migration never finished.

=> ssh into the VM, "kill -STOP pids" the most active processes.
You might observe that your cursor freezes for a second, 
then that was the migration (optionally: verify RUNNING),
and "kill -CONT pids". 

Of course, it could also be something else


IPB Halle                    AG Massenspektrometrie & Bioinformatik
Dr. Steffen Neumann          http://www.IPB-Halle.DE
Weinberg 3                   http://msbi.bic-gh.de
06120 Halle                  Tel. +49 (0) 345 5582 - 1470
                                  +49 (0) 345 5582 - 0
sneumann(at)IPB-Halle.DE     Fax. +49 (0) 345 5582 - 1409

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