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Rolling back to the current instance
SQL Server offers a rollback tool to perform rollback operations on instances, and reconstructs historical data through regular backups and real-time transactions. This document describes how to roll back to the current instances for single database, multiple databases, or all the databases according to a time point or a backup set.
Prerequisites
To utilize the rollback feature, there must be SQL Server instances. For instructions on the creation of instanes, please refer to Creating SQL Server Instance.
In order to use the rollback feature, a database must exist under an instance. For instructions on the creation of a database, see Creating a Database.
Points of Attention
Before initiating a rollback, please ensure there is sufficient storage space for an instance.
Ensure that no other tasks are being performed for the source instance before initiating a rollback.
When you choose to overwrite the original database during a rollback operation, if the rollback database instance has a read-only instance, the read-only instance will resynchronize data. During the resynchronization period, operations cannot be performed on the read-only instance. After synchronization is completed, operations can be performed.
The steps are as follows
1. Log in to the TencentDB for SQL Server console.
2. Select the Region on the top, locate the required instance, and click Instance ID or Manage in the Operation column to go to the instance management page.
3. On the right side, click Rollback, or navigate to Backup Management > Data Backup, locate the corresponding backup file, and click Rollback in the Operation column.
4. In the pop-up rollback settings interface, complete the corresponding configurations based on the selected rollback method and click OK.
Scenario One: Rollback by Time Point
Parameter | Description |
Select the target instance | Select Rollback to Current instance. |
Select rollback mode | Select Rollback by Time Point. You can roll back the database to a specific time point from a source database instance. The time range dpends on the log backup retention period you set. |
Set rollback time | Select the rollback time. Please select "Beijing" time for the rollback operation. A uniform rollback time can only be set for databases for the same instance. |
Overwrite original database | Select whether the database to be rolled back needs to overwrite the original database. If you select Yes, once the rollback is successful: the original database will be renamed RESTORE_OLD_*_original database name. The new database obtained after the rollback will use the original database name. If the "Yes" option is left unchecked, after a successful rollback: the original database remains unchanged, while the newly rolled-back database will bear the user-defined name (defaulting to a system-generated name if not specified). |
Select the database to be rolled back | Select the database(s) to be rolled back, supporting single database, multiple databases, or selecting all databases for rollback. You can quickly filter databases by searching their names. If you choose not to overwrite the original database, the selected database(s) can be renamed under the "Rollback Database" section on the right. If no renaming is performed, the system will automatically generate a new database name with the format of a prefix followed by the original database name. The rolled-back database name only supports "letters", "numbers", "_", or "-", must start with a letter, and can contain up to 128 characters. If you choose to overwrite the original database, renaming under the "Rollback Database" section is not required. |
Scenario Two: Rollback by Backup Set
Parameter | Description |
Select the target instance | Select Rollback to Current instance. |
Select rollback mode | Choose Rollback by Backup Set. You can roll back a new database from a specific backup set, with the selection range determined by the data backup retention period you have set. |
Select replica set | Select the backup set for rollback. You can restore a new database from the specified backup set. The range of available backup sets is determined by the data backup retention period you have configured. When the backup file is in the form of a single database backup, the database name within the backup file will be displayed in the search bar. |
Overwrite original database | Select whether the database to be rolled back needs to overwrite the original database. If you select Yes, once the rollback is successful: the original database will be renamed RESTORE_OLD_*_original database name. The new database obtained after the rollback will use the original database name. If you select "Yes", after the rollback is completed: the original database remains unchanged, while the newly rolled-back database will bear the user-defined name (defaulting to system-generated). |
Select the database to be rolled back | Select the database(s) to be rolled back, supporting single database, multiple databases, or selecting all databases for rollback. You can quickly filter databases by searching their names. If you choose not to overwrite the original database, the selected databases can be renamed under the "Rollback Database" section on the right. If no renaming is performed, the system will automatically generate names for the new rolled-back databases in the format of "prefix + original database name". The rolled-back database names only support "letters", "numbers", "_", and "-", must begin with a letter, and have a maximum length of 128 characters. If you opt to overwrite the original database, renaming under the "Rollback Database" section is not required. |
5. You may check the rollback status and records under the Rollback History tab. To monitor the progress of a rollback task, simply click the task icon in the upper-right corner of the Backup Management page.
Related APIs
API | Description |
This API is used to query databases that can be rolled back. | |
This API is used to query the time range available for instance rollback. | |
This API is used to roll back the instance by time point. | |
This API is used to roll back the database by backup set. | |
This API is used to query the list of rollback tasks. | |
This API is used to delete rollback task records. |
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