[Users] [vdsm] Migration failed (previous migrations succeded)

[Michal Skrivanek]

On Feb 1, 2014, at 18:25 , Itamar Heim <iheim at redhat.com> wrote:

> On 01/31/2014 09:30 AM, Sven Kieske wrote:
>> Hi,
>> 
>> is there any documentation regarding all
>> allowed settings in the vdsm.conf?
>> 
>> I didn't find anything related in the rhev docs
> 
> that's a question for vdsm mailing list - cc-ing…

the vdsm.conf has a description for each parameter…just search for all containing "migration":)
we do want to expose some/most/all of them in UI/REST eventually, the "migration downtime" setting is there now in 3.4, but others are missing

Thanks,
michal
> 
>> 
>> Am 30.01.2014 21:43, schrieb 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)
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>>> 
>>> 
>>> 
>> 
> 
> 
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