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From Chip Childers <>
Subject Re: Disk I/O polling
Date Thu, 02 Aug 2012 15:33:35 GMT

This is a great idea!

Can you do us all a favor (well, David and whomever is going to help
him on Wiki migrations) and put this in the ASF wiki instead? -

As for other HVs, I think that VMware shouldn't be a problem for those
stats.  It might depend on the version, but I believe they are
available.  You can at least get IOPS out of it.


On Thu, Aug 2, 2012 at 11:23 AM, Wido den Hollander <> wrote:
> Hi,
> I've been thinking about this for a couple of months while working on RBD.
> In public clouds it's very important to know which user is (ab)using your
> storage, so I figured it could be useful if CloudStack would also support
> disk I/O polling.
> On the Wiki I started with a document about this:
> I only have experience with KVM, so I'm not sure if and how other
> Hypervisors support this.
> For KVM it seems the implementation is rather simple, but I rather not make
> this a KVM-only feature.
> The first steps will be to lay the groundwork in CloudStack and the polling
> for disk IOps and then implement it per Hypervisor.
> I'd like some input on other Hypervisors to get a better picture of what has
> to be done.
> Comments and flames are welcome :)
> Wido

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