On 11/07/2014 02:24 PM, windy wrote: > Dear Libvirt: How do I get the progress of a long operation (such as > Snapshot take and recover )through libvirt API?
virsh exists as a sample of how to do this for several long-running APIs. Some APIs are (currently) blocking-only; for those, you have to have a second thread/process open a second connection to the hypervisor to track ongoing progress (see how 'virsh migrate --verbose' does this). Others are asynchronous by default, and require you to poll or wait for an event for the end of the operation; so a single thread can also query state in the middle of the operation (see how 'virsh blockpull --wait --verbose' works). And for some APIs, we just haven't yet implemented job reporting and status of those jobs (sadly; 'virsh vol-download' is an example of this); patches are welcome to help us improve these interfaces to use a more generic job handling mechanism that can let us run multiple jobs in parallel. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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