This topic describes how to migrate an instance from a single zone to three zones.
Procedure
Log on to the PolarDB for Xscale console.
In the top navigation bar, select the region where the target instance is located.
On the Instances page, click the PolarDB-X 2.0 tab.
Find the target instance and click its ID.
In the left-side navigation pane, select Basic Information. In the upper-right corner of the Topology Information section, click Migrate Across Zones.
In the Migrate Across Zones dialog box, click Three-zone. Then, select the zones to which you want to migrate data and the switching mode.
Click OK. Wait until the migration task is completed.
Data is migrated across data centers in the migration task. The total migration time varies based on the size of the migrated data.