Re: [Xen-devel] A migration framework for external devices

[Stefan Berger <stefanb@xxxxxxxxxx>]

ncmike@xxxxxxxxxxxxxxxxxxxxxxx wrote on 02/08/2006
05:32:07 PM:

> Stefan Berger wrote:
> >>>  To be a bit clearer on the idea of the framework:
It would consist of 
> > a 
> >>> deamon running on the target machine whose different
plug-ins know how 
> > to 
> >>> handle the migration of different pieces of state information
and know 
> > how 
> >>> to de-serialize them (which mere 'scp' would not do).
> >> So an underlying assumption would be that the local and remove
real or
> >> virtual devices support serialize/deserialize of state, correct?
> > 
> > Yes, that's correct.
> 
> Would also  be very cool if the framework had pre-migration hooks.
For 
> example, allow someone to write a plugin to verify that the target
host 
> is qualified and in a good state to accept a migration  before
it 
> actually starts.

It should be possible to do that as long as it is
definable what 'good state' means.
> 
> Also, some physical devices may need to be configured/re-configured
on 
> the target prior to a migration (infiniband, fiber channel, iscsi)
and 
> it would be good to have plugins for that as well.

Again, this also sounds good to me. 

Another question is whether an extensible protocol
exists that could be recycled for this purpose or we have to build something
from ground up.

  Stefan

> 
> Mike
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