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    Server Migration Center:Cross-zone migration

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    Server Migration Center:Cross-zone migration

    Last Updated:Oct 10, 2026

    Move ECS instances between availability zones in the same region while optionally changing instance types.

    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.

    Benefits

    • High efficiency

      Migrate multiple ECS instances across zones in a single batch.

    • Low costs

      No new instances required in the destination zone.

    • Seamless upgrade

      Change instance configurations during migration.

    • Simple process

      Migrate across zones in a few steps.

    Migration process

    The following diagram illustrates the migration workflow.

    image

    Limitations

    • Spot 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 Upgrade 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)

    Procedure

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