Server Migration Center (SMC) is a migration platform provided by Alibaba Cloud. SMC offers migration services with universal capabilities, consistent experience, and high efficiency. This meets your migration requirements when you use Alibaba Cloud services. This topic describes the migration tools, migration principles, migration billing, migration process, feedback, and suggestions to help you quickly understand the migration of ECS instances across zones in the same region.
How it works
The following figure shows the principle of cross-zone migration:
Server migration principles:
A user creates a cross-zone migration task.
The SMC service calls the underlying Elastic Block Storage capability to replicate disk data across zones and change properties such as instance types.
Migration workflow
The following figure shows the cross-zone migration process.
Migration process:
Before you begin
Before you use SMC to migrate ECS instances, you must register an Alibaba Cloud account, complete real-name verification, activate RAM, and enable snapshots. For more information, see Prepare for migration.
Cross-zone-migration
SMC allows you to migrate ECS ECS instances to different zones in the same region. You can also change the instance types (vCPUs and memory) within the same instance family to meet your business requirements. For more information, see Cross-zone migration.
Verify the migration result
SMC supports multiple migration scenarios. You can create migration tasks based on your business requirements. For more information, see Verify the migration results.
Billing rules
If you do not change the instance specifications during migration, no fees are incurred.
If you change the specifications during migration, the costs may change.
If you downgrade the specifications of a package year or month instance, a refund may be issued. The refund amount is the difference between the new configuration price and the remaining valid purchase price before the downgrade.
If you upgrade the instance type of a subscription ECS instance, you must pay for the price difference between the original instance type and the new instance type for the remainder of the current billing cycle. Actual fees are displayed in the ECS console.
If you change the instance type of a pay-as-you go ECS instance, you are charged based on the new instance type.
Feedback and suggestions
If you have any questions or suggestions during the use of SMC, you can feedback and obtain technical support in the following ways to obtain better service and better product experience.
(recommend) Click the link or scan the following QR code to join the technical support DingTalk group. (Download DingTalk.)
Pre-sales consultation: Before purchasing Alibaba Cloud products, you can call Alibaba Cloud's pre-sales phone number or contact your Alibaba Cloud account manager to learn or consult about the products. For more information, see Pre-sales consultation.
After-sales support: If you encounter problems with Alibaba Cloud products or services, you can contact us by calling Alibaba Cloud after-sales service or submitting a ticket. For more information, see After-sales support.
Document feedback: If you find a problem with the product document, such as a link, content, or API error, you can click AI Assistant in the navigation pane on the right of the document page or select the content.