[Users] Migration failed (previous migrations succeded)

[Itamar Heim]

On 01/30/2014 10:37 PM, Markus Stockhausen wrote:
>>> Von: Itamar Heim [iheim at redhat.com]
>>> Gesendet: Donnerstag, 30. Januar 2014 21:25
>>> An: Markus Stockhausen; ovirt-users
>>> Betreff: Re: [Users] Migration failed (previous migrations succeded)
>>>
>>>
>>> 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
>>>
>>
>> what's the bandwidth? default is up to 30MB/sec, to allow up to 3 VMs to
>> migrate on 1Gb without congesting it.
>> you could raise that if you have 10GB, or raise the bandwidth cap and
>> reduce max number of concurrent VMs, etc.
>
> My migration network is IPoIB 10GBit. During our tests only one VM
> was migrated.  Bandwidth cap or number of concurrent VMs has not
> been changed after default install.
>
> Is migration_max_bandwidth in /etc/vdsm/vdsm.conf still the right place?

probably

> And what settings do you suggest?

well, to begin with, 300MB/sec on 10GE (still allowing concurrent 
migrations)