Re: [Qemu-devel] [PATCH RFC 2/4] Curling: cmdline interface

[Juan Quintela <quintela@redhat.com>]

Paolo Bonzini <pbonzini@redhat.com> wrote:
> Il 10/09/2013 18:37, Juan Quintela ha scritto:
>>> I think for the outgoing side it should just be "migrate -f tcp:foo:9999".
>>>
>>> On the incoming side, perhaps you could have a different ID instead of
>>> QEMU_VM_FILE_MAGIC, that triggers fault-tolerance mode automatically?
>>> Then again it would be simply "-incoming tcp:foo:9999".
>> 
>> Then how can you distingish between faultolerance and simple migration?
>> You need to diferentiate on both sides.
>> 
>> - outgoing side: you need to continue running after sending the whole
>>   state
>> - incoming side: after receivinga lot,  you apply it,  and have to wait
>>   for the next one.
>> 
>> It is a different thing to do,  we need to tell qemu somehow.
>
> You look at the first 4 bytes in the stream and distinguish the two cases.

We need to change how things are handled, but nothing too complicated.
Are we sure we don't want curling over exec/unix/fd?

Later, Juan.