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Re: [Xen-devel] [PATCH 0/6] [VERY RFC] Migration Stream v2



David Vrabel writes ("Re: [Xen-devel] [PATCH 0/6] [VERY RFC] Migration Stream 
v2"):
> On 14/04/14 18:49, George Dunlap wrote:
> > What did you imagine might constitute an "Optional" record?
> 
> This was something Ian Jackson asked for and it seems like a useful
> capabilitity to have for future use.  Not sure what it might be used for
> yet.

Right.

Long experience with protocol design has taught me that protocols
should almost always have both an extensibility mechanism which is
ignored by ignorant receivers, and one which causes ignorant receivers
to abort.

I don't know yet what we might use it for.  However, we should test
that it works (ie is ignored by) the receiver (or it will be useless).

Ian.

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