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Server Migration Center:Cross-zone migration

Last Updated:Oct 08, 2024

Server Migration Center (SMC) allows you to migrate an Elastic Compute Service (ECS) instance across zones in a region and change the instance type at the same time based on your business requirements.

Scenarios

  • Change the zone of an ECS instance

    • The available instance types of ECS instances in the current zone cannot meet your business requirements. You want to change the instance types of the instances to a specific instance type in a different zone within the same region.

    • You want to migrate ECS instances to another zone within the same region based on your business requirements.

  • Change the instance type of an ECS instance

    You want to change the instance type of your ECS instance because the current instance type cannot meet your business requirements.

Benefits

  • High migration efficiency

    You can migrate multiple ECS instances across zones at a time to improve migration efficiency.

  • Low costs

    You do not need to purchase new ECS instances in other zones. This reduces costs.

  • Seamless upgrade

    You can upgrade the configurations of ECS instances and migrate them across zones at the same time.

  • Simple and convenient operations

    You can complete a cross-zone migration job with simple operations.

Migration process

The following figure shows the process of migrating an ECS instance across zones.

image

Limits

  • Preemptible instances are not supported.

  • You must change the instance type of an ECS instance within the same instance family. For more information about instance families, see Overview of instance families.

  • The following instance families do not support instance type changes across zones:

    • Heterogeneous computing instance families

    • ECS Bare Metal Instance families

    • Super Computing Cluster (SCC) instance families

    • u1, universal instance family

    • e, economy instance family

    • x86-based instance families

      • Big data instance families

      • Instance families with local SSDs

      • Security-enhanced instance families

    • Instance families of the eighth generation, including g8ise, g8a, g8i, g8ae, g8y, c8a, c8i, c8ae, c8y, r8a, r8i, r8ae, and r8y

Procedure

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