[libvirt] [PATCH 0/3] Transport network port data during live migration

Laine Stump laine at laine.org
Sun Sep 30 14:44:36 UTC 2012


On 09/28/2012 03:58 PM, Kyle Mestery (kmestery) wrote:
> As an example, an OpenFlow controller may have certain information about the
> port, specific to this controller, which it may want to store with the port itself on the
> host. This especially true if an agent exists on the host which needs to read this data,
> update it, and use it to perform some tasks. It's convenient to have this data stored
> as close to the port itself, which in this case is the OVS DB, and having it transferred
> as part of the migration protocol is also very handy.
>

But how big is it, and what does it look like? (I assume it's all
printable ASCII, since you're getting it as the output of a shell command)

If it's *really* large, possibly it would go better as a subelement of
<interface>, rather than an attribute, i.e.:

   <interface index='1' vporttype='openvswitch'>
     <portdata>
     blah blah blah blah
     </portdata>
   </interface>




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