Database Backup (DBS) can automatically archive backup sets to a backup server. This way, backup sets that are generated by an O&M account can be archived to a server that belongs to a backup account. The data of the two accounts is isolated from each other to prevent the risk of data loss caused by database deletion. This topic describes how to automatically archive backup sets to a backup server. In this example, backup sets of an ApsaraDB RDS instance are automatically archived to an Elastic Compute Service (ECS) instance.
How it works
- Use an O&M account to create a DBS backup schedule and enable automatic backup.
- Use a backup account to purchase an ECS instance as a backup server.
- Install a backup gateway on the ECS instance by using an AccessKey pair of the O&M account.
- Use the O&M account to enable automatic download of backup sets.
Step 1: Create a backup schedule by using an O&M account
Go to the DBS buy page to create a backup schedule. For more information, see Create a backup schedule.
Step 2: Configure the backup schedule by using the O&M account
Log on to the Database Backup (DBS) console.
In the left-side navigation pane, click Backup Schedules. In the top navigation bar, select a region.
On the Backup Schedules page, find the ID of the backup schedule that you want to configure and click Configure Backup Schedule in the Actions column.
- In the Configure Backup Source and Destination step of the Configure Backup Schedule wizard, configure the backup source and destination, and click Next.
Table 1. Parameters Section Parameter Description N/A Schedule Name The name of the backup schedule. DBS automatically generates a backup schedule name. We recommend that you enter a descriptive name that is easy to identify. Backup schedule names do not need to be unique.
Backup Source Information Backup Mode The method that is used to back up data. The default value of this parameter is the backup method that you selected when you purchased the backup schedule. In this example, Logical Backup is selected.
Database Location The location of the source database. In this example, RDS Instance is selected. Instance Region The region in which the ApsaraDB for RDS instance that you want to back up resides. RDS Instance ID The ID of the ApsaraDB for RDS instance that you want to back up. Database Account The username of the account that is used to connect to the database that you want to back up. The account must have specific permissions to back up the database. For more information, see Account permissions.
Note For ApsaraDB for RDS databases, read-only permissions are required for backup, and read and write permissions are required for backup and restoration.Password The password of the account that is used to connect to the database that you want to back up.
After you enter the username and password of the database account, click Test Connection next to the password to check whether the information about the database that you want to back up is valid. If the specified parameters are valid, the Test Passed message is displayed. If the Test Failed message is displayed, click Check next to Test Failed. Modify the information about the database that you want to back up based on the check results.
SSL Encryption The method that is used to encrypt the backup data. Valid values: - Non-encrypted
- SSL-encrypted: SSL encrypts network connections at the transport layer to improve the security and integrity of data in transit. However, SSL increases the network connection response time.
If you want to select SSL-encrypted, you must enable SSL encryption for the ApsaraDB for RDS instance before you configure the backup schedule. For more information, see Step 1: Enable the SSL encryption feature for an RDS instance.
Note This parameter is displayed only if you set Database Type to MySQL.Backup Destination Information Backup Storage Type The type of storage that is used to store the backup data. Valid values: DBS Storage (recommended): Backup data is stored in DBS without the need to create an Object Storage Service (OSS) bucket. You are charged based on the volume of your data that is stored in DBS. For more information about the billing method, see Storage costs.
OSS For User: You must create a bucket in the OSS console in advance. For more information, see Create buckets.
Note If you want to configure automatic download of backup sets, you must select DBS Storage (recommended).Storage Encryption The method that is used to encrypt the stored data. Valid values: Encrypted: recommended. DBS uses AES-256 to encrypt data.
The server-side encryption feature is used in OSS. When you upload an object to OSS, OSS encrypts and stores the object. When you download the encrypted object from OSS, OSS decrypts the object and returns the decrypted object to you. For more information, see Server-side encryption.
Non-encrypted: The backup data is not encrypted.
In the Edit Backup Objects step, find the database or table that you want to back up and add it to the Selected section. Then, click Next.
NoteIf you selected Logical Backup when you purchased a backup schedule, DBS allows you to specify the databases and tables to be backed up during full backups. You can back up a single table, a single database, multiple databases, or an entire database instance for some types of databases during full backups. DBS supports incremental backups only for some types of databases. By default, all the incremental data is backed up during incremental backups.
You can click Select All in the lower-left corner of the Available section to back up the entire database. The database objects that can be backed up and the backup granularity vary based on the database type. For more information, see Database engines and features.
By default, a backup schedule cannot be used to back up a database that is created after the backup schedule is configured. To back up the database, you can add the database to the backup schedule on the Edit Backup Objects page of the backup schedule. For more information, see Modify backup objects.
If you selected Physical Backup when you purchased a backup schedule, you must back up an entire database instance.
In the Configure Backup Time step, configure the parameters that are described in the following table. Then, click Next in the lower-right corner of the page.
Parameter
Description
Full-scale Backup Frequency
The frequency of the backup schedule. Valid values: Periodic Backup and Single Backup.
NoteIn scenarios in which incremental data needs to be restored, we recommend that you select Periodic Backup and perform a full backup at least once a week. Otherwise, a large number of binary logs must be replayed during restoration. This process is prone to errors and may result in a prolonged recovery time objective (RTO).
Full Data Backup Recurrence
The days of the week on which DBS runs the backup schedule. This parameter is required if the Full-scale Backup Frequency parameter is set to Periodic Backup. Select at least one day of the week.
Started At
The point in time at which DBS starts a full backup. This parameter is required if the Full-scale Backup Frequency parameter is set to Periodic Backup. We recommend that you specify a point in time during off-peak hours. Example: 01:00.
NoteIf a previous full data backup is not complete at the start time of the next backup, DBS skips the next backup.
Incremental Backup
Specifies whether to enable incremental backup. If you enable incremental backup, make sure that the binary logging feature is enabled for the database that you want to back up.
NoteThis parameter is displayed only if you set the Full-scale Backup Frequency parameter to Periodic Backup.
By default, the binary logging feature is enabled for an ApsaraDB RDS for MySQL instance. If you use a self-managed database, you must manually enable the binary logging feature.
Maximum Concurrent Threads for Full Data Backup
The maximum number of concurrent threads that are available for a full backup. You can configure this parameter to adjust the backup speed. For example, you can reduce the number of backup threads to minimize impacts on the database.
The maximum number of actual concurrent threads varies based on backup schedule specifications. For more information, see How do I change the maximum backup speed?
Backup network speed limit
The limit on the network bandwidth. Unit: MB/s. You can set the limit based on your business requirements. The default value 0 indicates that the network bandwidth is unlimited.
NoteThis parameter is displayed only when you configure a backup schedule for a MySQL database.
In the Edit Lifecycle step, configure the lifecycle for full backup data in the Configure Full Data Backup Lifecycle section.
NoteIf you set the Incremental Backup parameter to Enable in Step 6, you must configure the lifecycle for incremental backup data.
After the configurations are complete, click Precheck in the lower-right corner of the page.
If the Precheck Passed message appears, click Start Task.
NoteIf the state of the backup schedule changes to Running, the backup schedule takes effect.
If an exception or error occurs when you start the backup schedule, troubleshoot the exception or error at the earliest opportunity. For more information, see How do I fix errors for an abnormal backup schedule in DBS? If your issue persists after you use the solution that is provided in the preceding topic, contact technical support in the DBS DingTalk group (ID: 35585947).
Step 3: Install a backup gateway by using a backup account
Step 4: Enable automatic download of backup sets by using the O&M account
Log on to the Database Backup (DBS) console.
In the left-side navigation pane, click Backup Schedules. In the top navigation bar, select a region.
- Click Schedule ID or Manage in the Actions column corresponding to a backup schedule.
On the Configure Task page, click Set backup set download rules in the Backup set download section.
NoteIf the database engine of a backup schedule does not support the download of backup sets or the destination storage type is not DBS built-in storage, the Set backup set download rules button is unavailable in the console.
Configure the parameters that are described in the following table.
Parameter
Description
Automatic download status
Specifies whether to enable automatic download. Select Enable.
Target type
By default, the parameter is set to the directory of the server on which the backup gateway is installed.
Backup Gateway
The backup gateway that is used by DBS to connect to the on-premises device. For more information, see Install a backup gateway.
ImportantThe automatic download of backup sets feature is not yet commercially available and does not ensure stable performance. To prevent data accumulation and other exceptions, we recommend that you do not use the same backup gateway to download the backup data of multiple backup schedules.
Target location
The type of the location and the corresponding directory to which the backup set is downloaded. Valid values:
Server directory
FTP direction
NAS direction
Minio direction
Full data format
This parameter is automatically configured by the system and cannot be modified.
NoteFor more information about the data format of full and incremental backup sets, see the "Feature limits and formats" section of the Overview topic.
Incremental data format
This parameter is automatically configured by the system and cannot be modified.
Click OK.
After you configure the automatic download of backup sets feature, DBS does not trigger the automatic download rule to download the historical backup data. DBS triggers the automatic download rule only when new full or incremental backup data is generated.
After the download is complete, decompress the downloaded package. By default, the backup sets are compressed in the
<Download task ID>.tar.gz
package. Run the following commands to decompress the downloaded package:Run the
gzip -d <Download task ID>.tar.gz
command to obtain the<Download task ID>.tar
file.Run the
tar xvf <Download task ID>.tar
command to obtain the<Download task ID>
file.
Step 5: View the download progress of backup sets by using the O&M account
Log on to the Database Backup (DBS) console.
In the left-side navigation pane, click Backup Schedules. In the top navigation bar, select a region.
- Click Schedule ID or Manage in the Actions column corresponding to a backup schedule.
In the left-side navigation pane of the page that appears, click Backup Set Download to view the download progress of each backup set.