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Re: [Xen-devel] xend / xenstored performance & scalability issues

  • To: "Daniel P. Berrange" <berrange@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
  • Date: Thu, 12 Oct 2006 15:25:06 +0100
  • Delivery-date: Thu, 12 Oct 2006 07:25:36 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcbuCjaddWz1TVn9EduoyQAX8io7RQ==
  • Thread-topic: [Xen-devel] xend / xenstored performance & scalability issues

On 12/10/06 15:16, "Daniel P. Berrange" <berrange@xxxxxxxxxx> wrote:

> Clearly we can't address these for 3.0.3, but I think both of these areas need
> serious work in 3.0.4 if we want a scalable control plane in Dom0. Fixing
> the XenD bit looks particularly hard because any single method using the
> convenience xenstored read functions can be called under many different
> contexts, so of which needs transactions, others which don't. It ought to
> be possible to trace back all the calls & make it possible to pass explicit
> xstransct objects into all calls & then kill off the convenience methods.

Yes, xenstored is very simple minded in many respects. We will certainly be
improving this during 3.0.4 development -- I think we can get the costs down
very significantly for commonplace operations without enormous effort.

 -- Keir

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