The topic describes how to restore the data of an ApsaraDB RDS for PostgreSQL instance to a new RDS instance.
The original RDS instance whose data you want to restore must meet the following requirements:
- The original RDS instance is in the Running state and is not locked.
- The original RDS instance does not have an ongoing migration task.
- If you want to restore data to a point in time, the log backup function is enabled for the original RDS instance.
- If you want to restore data from a backup, the original RDS instance has at least one backup.
ApsaraDB RDS for PostgreSQL allows you to restore data from a backup or to a point in time. The restoration procedure is as follows:
- Restore data to a new RDS instance. This process was known as instance cloning.
- Verify data on the new RDS instance.
- Migrate data to the original RDS instance.
- The new RDS instance must have the same IP address whitelist, backup, and parameter settings as the original RDS instance.
- The data and account information of the new RDS instance must be the same as the data and account information indicated by the specified data or log backup file of the original RDS instance.
The price of the new RDS instance is the same as the price that you must pay when you create an RDS instance. For more information, see the pricing information at ApsaraDB for RDS.
Restore data to a new RDS instance
- Log on to the ApsaraDB for RDS console.
- In the left-side navigation pane, click Instances. In the top navigation bar, select the region where your RDS instance resides.
- Find your RDS instance and click its ID.
- In the left-side navigation pane, click Backup and Restoration.
- In the upper-right corner of the page, click Restore Database (Previously Clone Database).
- Configure the following parameters.
Parameter Description Billing Method
- Subscription: A subscription-billed instance is an instance that you can subscribe to for a specified period of time and pay for up front. Subscription billing is more cost-effective than pay-as-you-go billing. Therefore, we recommend that you select subscription billing with a longer commitment. You can receive larger discounts for longer subscription periods.
- Pay-As-You-Go: A pay-as-you-go-billed instance is charged per hour based on your actual resource usage. We recommend that you select pay-as-you-go billing for short-term use. If you no longer need your pay-as-you-go-billed instance, you can release it to reduce costs.
Note The By Time option appears only when the log backup function is enabled.
- By Time: allows you to restore data to a point in time within the specified log backup retention period. For more information about how to view or change the log backup retention period, see Back up an ApsaraDB RDS for PostgreSQL instance.
- By Backup Set: allows you to restore data from a backup within the specified data backup retention period.
Edition Zone of Primary Node
The zone to which the RDS instance belongs. A zone is an independent physical location within a region. The Zone of Primary Node parameter specifies the zone to which the primary RDS instance belongs. The Zone of Secondary Node parameter specifies the zone to which the secondary RDS instance belongs.
You can select the Single-zone Deployment or Multi-zone Development method.
- Single-zone Deployment: The Zone of Primary Node and the Zone of Secondary Node are the same.
- Multi-zone Deployment: The Zone of Primary Node and the Zone of Secondary Node are different. After you specify the Zone of Primary Node, the system automatically allocates the Zone of Secondary Node.
The multi-zone deployment method provides zone-level disaster recovery. We recommend that you select the multi-zone deployment method.Note
- After the RDS instance is created, you can view information about the RDS instance and its secondary RDS instance on the Service Availability page.
- If you select the RDS Basic Edition, the database system consists of only one RDS instance and supports only the single-zone deployment method.
Instance Type Capacity
- Click Next: Instance Configuration.
- Configure the following parameters.
Parameter Description Network Type
Note The RDS instance must have the same network type as the ECS instance that you want to connect. If the RDS and ECS instances both have the VPC network type, they must also reside in the same VPC. Otherwise, the RDS and ECS instances cannot communicate over an internal network.
- Classic Network: the traditional type of network.
- VPC: A virtual private cloud (VPC) is an isolated network that provides higher security and better performance than the classic network. If you select the VPC network type, you must also specify the VPC and the VSwitch of Primary Node.
Resource Group The resource group to which the new RDS instance belongs.
- Click Next: Confirm Order.
- Confirm the settings in the Parameters section, specify the Purchase Plan and the Duration, read and select Terms of Service, and click Pay Now. You need to specify the Duration only when the new RDS instance uses subscription billing.
Verify data on the new RDS instance
For more information, see Connect to an ApsaraDB RDS for PostgreSQL instance.
Migrate data to the original RDS instance
After you verify the data on the new RDS instance, you can migrate the data from the new RDS instance back to the original RDS instance. For more information, see Migrate data between RDS instances.