[ovirt-users] Actual downtime during migration?

[Doug Ingham]

>
> its memory resynchronised one last time
>
Actually, thinking about it, rather than diffing *all* of the memory on the
first host to resync it at the last moment, the hypervisor probably
simultaneously copies the current state of memory & uses copy-on-write
(COW) to write all new transactions to both hosts.
Only a technical difference, but it'd greatly reduce how long the VM needs
to be paused to complete a full sync.

-- 
Doug
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