Re: [libvirt] [PATCH 1/5] Add virDomainGetBlockInfo API to query disk sizing

On 04/27/2010 01:34 PM, Daniel P. Berrange wrote: > Some applications need to be able to query a guest's disk info, > even for paths not managed by the storage pool APIs. This adds > a very simple API to get this information, modelled on the > virStorageVolGetInfo API, but with an extra field 'physical'. > Normally 'physical' and 'allocation' will be identical, but > in the case of a qcow2-like file stored inside a block device > 'physical' will give the block device size, while 'allocation' > will give the qcow2 image size ACK, and thanks for the examples in the comments. > + * - Fully allocated raw file in filesystem: > + * * capacity, allocation, physical: All the same Actually, might it be possible that allocation/physical might be slightly higher than capacity, to account for inode overhead and rounding up to block size? But I don't see the need to clutter this documentation with that level of detail.