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by paulfurtado
1397 days ago
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The disks are physically attached to the host. The VM running on that host moves from one host to another. GCP live-migrates every single VM running on GCP roughly once per week, so live migration is definitely seamless. Standard OSS hypervisors support live migration. When hardware fails, the instance is migrated to another machine and behaves like the power cord was ripped out. It's possible they go down this path for failed disks too, but it's feasible that it is implemented as the disk magically starting to work again but being empty. You can read more about GCP live migrations here: https://cloud.google.com/compute/docs/instances/live-migrati... |
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