SMC helps you migrate ECS instances across availability zones within the same region. This guide covers migration principles, billing, workflow, and feedback channels.
How migration works
The following figure illustrates cross-zone migration.
Server migration principles:
Create a cross-zone migration task.
SMC replicates disk data across zones through the block storage service and updates instance properties such as instance type.
Migration workflow
The following figure illustrates the migration workflow.
The workflow has three phases:
Preparation
Register an Alibaba Cloud account, complete identity verification, and activate RAM and snapshot services as described in Preparation.
Cross-zone migration
Migrate an ECS instance to a different zone in the same region. You can also change the instance type, such as vCPU and memory, within the same instance family. Migrate an ECS instance across zones.
Verify the migration
SMC supports multiple migration scenarios. Create a migration task for your scenario, then verify the results. Verify the migration.
Billing
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No fees are incurred if you do not change the instance type during migration.
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If you change the instance type during migration, the following billing rules apply:
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Downgrading a subscription instance: Downgrading the instance type may result in a refund. The refund is the difference between the remaining value of the original configuration and the price of the new configuration.
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Upgrading a subscription instance: You must pay the price difference for the remainder of the current billing cycle. The console displays the actual fee.
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Changing a pay-as-you-go instance: After the migration, the instance is billed based on the new instance type.
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Feedback and support
For questions or suggestions, join the SMC DingTalk support group or scan the QR code below. Download the DingTalk client
