Re: [libvirt] [Qemu-devel] QEMU interfaces for image streaming and post-copy block migration

Right, I'm a little hesitant to get too far into discussing the management interface because I remember long threads about polling and async. I never fully read them but I bet some wisdom came out of them that applies here. There are two ways to do a long running (async?) task: 1. Multiple smaller pokes. Perhaps completion of a single poke is async. But the key is that the interface is incremental and driven by the management stack. 2. State. Turn on streaming and watch it go. You can find out its current state using another command which will tell you whether it is enabled/disabled and progress. Use a command to disable it.