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From Edison Su <Edison...@citrix.com>
Subject RE: Disk I/O polling
Date Thu, 02 Aug 2012 20:35:51 GMT


> -----Original Message-----
> From: Wido den Hollander [mailto:wido@widodh.nl]
> Sent: Thursday, August 02, 2012 8:24 AM
> To: cloudstack-dev@incubator.apache.org
> Subject: Disk I/O polling
> 
> 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:
> http://wiki.cloudstack.org/pages/viewpage.action?pageId=11830451
> 
> 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.

Xen has the feature: http://wiki.xensource.com/xenwiki/XAPI_RRDs

> 
> Comments and flames are welcome :)
> 
> Wido

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