A MySQL InnoDB Cluster provides high availability for a single database cluster using Group Replication. This works well for node failures inside the cluster, but disaster recovery usually requires another cluster in a separate location: another Kubernetes cluster, region, data center, or cloud. This replica cluster needs to stay in sync with the primary, remain protected from accidental writes, and be ready to take over when you need to move traffic, either as a planned operation or during an outage.