[libvirt] some unsorted questions

Stefan de Konink skinkie at xs4all.nl
Thu Jul 17 13:52:32 UTC 2008


Daniel P. Berrange schreef:
> In the case of the Xen drivers, this requires  O(n) calls to XenD which
> are rather expensive. XenD does actually have ability to return data about
> all domains in a single request. So if we had an API for fetching all
> domains at once it'd only require  O(1)  expensive XenD calls. I'd imagine
> something like this
> 
> 
>     int virConnectListAllDomains(virConnectPtr conn,
>                                  virDomainPtr **domains,
>                                  int stateflags);
> 
> The 'stateflags' parameter would be a bit-field where each bit corresponded
> to one of the virDomainState enumeration values. The 'domains' list would
> be allocated by libvirt, and filled in with all the domain objects, and
> the total number of domains as the return value.

Yes; initially I was looking for something like this. I think this is a 
great idea. Now I wonder, if it could be faster (with the lookup 
mechanism) to check if the domain exists, before connecting to it.


Stefan




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