Cross-zone migration

Use cases

Change the zone of an ECS instance
- The required instance types are unavailable in the current zone.
- Business needs require instances in a different zone within the same region.
Change the instance type of an ECS instance

The current instance type does not meet your requirements.

The following diagram illustrates the migration workflow.

Preemptible instances do not support cross-zone migration.
When you change an instance type, you can only select a new type within the same instance family (vCPUs and memory). For more information about instance families, see Instance families.

Note
If you want to change to an instance type in a different instance family, first migrate the instance across zones and then change the instance type. For more information, see Change the instance type of a subscription instance or Change the instance type of a pay-as-you-go instance.
You can migrate a maximum of 5 instances at a time in the ECS console. To increase this limit, contact technical support.
The following instance families do not support cross-zone migration:
- Heterogeneous computing
- ECS Bare Metal Instance
- Super Computing Cluster (SCC)
- General-purpose compute-optimized instance family u2a
- Some burstable instance families e (only e-c1m1, e-c1m2, and e-c1m4 are supported)
- x86-based computing
  - Big data
  - Local SSDs
  - Security-enhanced
- Some 8th-generation instance families (only hfr8i, hfc8i, hfg8i, r8ae, g8ae, c8ae, r8y, c8y, g8y, r8a, g8a, c8a, g8i, r8i, and c8i are supported)
- Some 9th-generation instance families (only r9i, g9i, and c9i are supported)

For more information about how to perform cross-zone migration, see Cross-zone migration guide.