Discussion
Arrange the stages of a live migration in order.
1. pause the guest briefly and copy the remainder
2. copy the memory of the running guest to the target
3. resume the guest on the target host
4. iteratively copy pages that changed during the previous pass
Answer: D
Correct answer: 2 - 4 - 1 - 3
Live migration copies memory while the guest keeps running, so the first pass is followed by iterative passes copying only the pages dirtied during the previous one. When the remaining set is small enough, the guest is paused for a few tens of milliseconds, the remainder and the CPU state are transferred, and it resumes on the target. The iteration exists precisely to make that final pause short enough to go unnoticed.
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