On 04-01-16 16:38, Jason Dillaman wrote:
> Short term, assuming there wouldn't be an objection from the libvirt 
> community, I think spawning a thread pool and concurrently executing several 
> rbd_stat calls concurrently would be the easiest and cleanest solution.  I 
> wouldn't suggest trying to roll your own solution for retrieving image sizes 
> for format 1 and 2 RBD images directly within libvirt.
> 

I'll ask in the libvirt community if they allow such a thing.

> Longer term, given this use case, perhaps it would make sense to add an async 
> version of rbd_open.  The rbd_stat call itself just reads the data from 
> memory initialized by rbd_open.  On the Jewel branch, librbd has had some 
> major rework and image loading is asynchronous under the hood already.
> 

Hmm, that would be nice. In the callback I could call rbd_stat() and
populate the volume list within libvirt.

I would very much like to go that route since it saves me a lot of code
inside libvirt ;)

Wido

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