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[libvirt] understanding managedsave



Hi,

I'm trying to understand how the managedsave and restoration features
work at the libvirt/qemu level.

I'd like to write a little python script to reproduce the feature to
learn how it works. So, I start a kvm guest by hand with

  qemu-kvm [...] -qmp tcp:localhost:4444,server

and connect to the QMP with telnet or the qemu qmp-shell for my tests.

>From what I've read, libvirt internally does a migration to a file:
qemuDomainSaveMemory() -> qemuMonitorToFile() -> qemuMonitorMigrateToFd(). 


Why do a migration instead of QMP stop/memsave?

What whould be the whole QMP/Monitor sequence of commands to handle the
process?


-- 
Nicolas Sebrecht


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