2:34 a.m.
I would like to use the virDomainMigrateSetMaxDowntime but I'm a bit
confused about how to use it.
If I try to set the downtime before I call domain.migrate(), I get the
error "domain is not being migrated". But I cannot call it afterwards
because domain.migrate() does not return until the migration has
completed.
Am I meant to put the call to domain.migrate() into a separate thread of
control, and then call SetMaxDowntime from my main thread after the
migration has begun? How do I even know if the migration has begun?
Thanks!
--Igor
7:48 p.m.
于 2010年12月17日 16:34, Igor Serebryany 写道:
I would like to use the virDomainMigrateSetMaxDowntime but I'm a
bit
confused about how to use it.
If I try to set the downtime before I call domain.migrate(), I get the
error "domain is not being migrated". But I cannot call it afterwards
because domain.migrate() does not return until the migration has
completed.
the API is intended to prevent the migration from lasting forever if
the memory of source domain is dirtying so quickly that QEMU does
not have time todo the final completion switchover, but not to
guarantee the migration will be finished more quickly.
so yes, domain.migration will not return till it's finished.
- Osier
1:19 a.m.
On Mon, Dec 20, 2010 at 09:48:21AM +0800, Osier Yang wrote:
so yes, domain.migration will not return till it's finished.
the problem is not that domain.migration will not return till it's
finished. that makes perfect sense and is totally fine.
the problem is that i can't seem to do ANYTHING else with libvirt while
domain.migration is running, including getting a domain object i can
call domain.setmaxdowntime on or even manage other totally unrelated
vms.
i am trying to figure out if this is just me doing something wrong, or
if this is a problem/design decision inside libvirt.
--igor
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participants (2)
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Igor Serebryany -
Osier Yang