[libvirt] libvirt(-java): virDomainMigrateSetMaxDowntime

Thomas Treutner thomas at scripty.at
Thu Sep 15 13:19:59 UTC 2011

On 07/13/2010 07:12 PM, Daniel P. Berrange wrote:
>> This tells me that calling migrateSetMaxDowntime is only allowed during
>> migrations. As I'm migrating VMs automatically and without any user
>> intervention I'd need to create some glue code that runs in an extra
>> thread, waiting "some time" hoping that the migration was kicked off in
>> the main thread yet and then calling migrateSetMaxDowntime. I'd like to
>> avoid such quirks in the long run, if possible.
> Multiple threads is our recommended approach to the problem, since it is
> a general solution. eg you can call virDomainSuspend to pause the guest
> during migration&  thus let it complete non-live. And virDomainGetJobInfo
> to check progress. And virDomainAbortJob to cancel.

Sorry to reanimate this zombie, but I think this approach isn't really 
doable in a clean way, but maybe I'm missing something. I've started a 
new thread with Message-ID: <4E709C1E.1030408 at scripty.at> here.

Maybe you could give your highly appreciated 0.02 $/€ ...

I've also sent a fix to the under-underlying issue, which was much more 
easy for me both than I thought and than getting multiple threads done 
right here (I think one can't, but see above etc.). Anyways, chances of 
acceptance are not too high, eventually. One can't argue with politics.



More information about the libvir-list mailing list