Re: [Xen-devel] [PATCH 17/27] tools/libxl: Support converting a legacy stream to a v2 stream

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Tue, 2015-06-16 at 16:13 +0100, Andrew Cooper wrote:

> > Since we only support N->N+1 we could perhaps tolerate the duplication
> > if we agreed upon a reasonable schedule to remove all this compat stuff,
> > e.g. in 4.7 or 4.8.
> 
> N->N+1 is another item on the "needs to be resolved before Xapi can use
> libxl" list.
> 
> In XenServer, we still have support for importing VMs from XenServer
> 4.0, which is certainly older than Xen 3.2

OK. FWIW I think we should consider importing (i.e. restore) separate to
migration, since the former can be subjected to more heavy duty offline
conversions if necessary.

It's not out of the question that this new migration stream format will
allow us to sensibly increase the +1 to some larger number for
migrations too.

Ian.

> It might be reasonable to make a compile time option to omit the legacy
> conversion, but conversion should absolutely be on by default for the
> first release after this series being accepted.
> 
> ~Andrew



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