[libvirt] [PATCH V4] implement offline migration

[liguang]

在 2012-09-04二的 12:12 +0100，Daniel P. Berrange写道：
> On Mon, Sep 03, 2012 at 02:23:24PM +0800, liguang wrote:
> > allow migration even domain isn't active by
> > inserting some stubs to tunnel migration path.
> > 
> > Signed-off-by: liguang <lig.fnst at cn.fujitsu.com>
> > ---
> >  src/qemu/qemu_driver.c    |    2 +-
> >  src/qemu/qemu_migration.c |  181
> > +++++++++++++++++++++++++++++++++++++++++++--
> >  src/qemu/qemu_migration.h |    3 +-
> >  3 files changed, 178 insertions(+), 8 deletions(-)
> 
> I really don't like the general design of this patch, even
> ignoring all the code bugs. I think this entire patch is
> really just a solution in search of a problem. Offline migration
> is already possible with existing libvirt APIs:
> 
>    domsrc = virDomainLookupByName(connsrc, "someguest");
>    xml = virDomainGetXMLDesc(domsrc);
>    domdst virDomainDefine(conndst, xml);
> 

Um, maybe you mean offline migration is just redefinition of domain at
target side, but what about disk images the domain used without sharing
files between source and target, do we have to take a look at this case?

> This proposed patch does not offer enough (or indeed any) compelling
> benefit over the above, to make it worth the including these hacks.
> 
> NACK to the entire patch.
> 
> Daniel.

-- 
liguang    lig.fnst at cn.fujitsu.com
FNST linux kernel team