Cluster migration migrates data from a cluster to another one. In certain scenarios, for example, due to the growing business data, you can create a cluster of higher specifications and migrate all data of the current cluster to the new one. Alternatively, you can merge indices in two clusters to one cluster to satisfy your business needs. CSS enables cluster migration by using the backup and index restoration function, specifically, by restoring the snapshot of a cluster to the target cluster.
In this example, assume that the following conditions apply: Data of cluster Es-1 is migrated to cluster Es-2,
If you use the backup and index restoration function for the first time, you need to perform basic configurations first. For details, see Manually Creating a Snapshot.
Click OK. You can also rename the restored index. For details, see Index Backup and Restoration.