Backend & systems·Deployment, release and rollback
you replace the instances a few at a time, so for ten minutes half the fleet is on the old version and half on the new.
Rolling update
Also calledrolling deploy
Replacing instances incrementally so capacity is maintained throughout. It is the default in every orchestrator and needs no extra infrastructure. It guarantees a period of mixed versions, which is why every change must be backward and forward compatible with the one before it.