Re: [Xen-devel] XenStore as a data transfer path?

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

On Sat, Jul 21, 2012 at 6:59 PM, Larry White <lmw@xxxxxxxxxxx> wrote:
>>>libvchan is your best bet.
>
> Have been looking at libvchan as you suggested.  An additional bit of
> information that I left out on my original post was that I would like to do
> this in a "one to many" environment.  In other words, I want to support data
> transfer from dom0 to a number of different domU's.  Would an approach such
> as libvchan allow for this or would I need a separate process in dom0 for
> each of the different domU channels?  I was really hoping to have a single
> process running in dom0 to manage this.

Depending on how "bleeding edge" you want to be, you may want to look
at the v4v patchset as well (currently under discussion).  I believe
one of the features of v4v was the ability to do one-to-many.

Regarding using XenStore for data transfer: it is, of course,
technically possible; but I think we want to discourage people from
doing that, as xenstore wasn't really designed for that purpose. I
don't think it should be relied on for latency, and using it as a
communication channel may have unfortunate side-effects on other users
of xenstore.

 -George

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