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> Ultimately, I found the answer in their tech docs where it was spelled out clearly that an fly instance is hardwired to one physical server and thus cannot fa
by dilyevsky 2y ago
> Ultimately, I found the answer in their tech docs where it was spelled out clearly that an fly instance is hardwired to one physical server and thus cannot fail over in case that server dies.
Majority of EC2 instance types did not have live migration until very recently. Some probably still don't (they don't really spell out how and when it's supposed to work). It is also not free - there's a noticeable brown-out when your VM gets migrated on GCP for example.
- ixaxaar 2y agoCan you shed some more light on this "browning out" phenomenon?
- toast0 2y agoHere's the GCP doc [1]. Other live migration products are similar. Generally, you have worse performance while in the preparing to move state, an actual pause, then worse performance as the move finishes up. Depending on the networking setup, some inbound packets may be lost or delayed. [1] https://cloud.google.com/compute/docs/instances/live-migration-process#how_does_the_live_migration_process_work https://cloud.google.com/compute/docs/instances/live-migrati...