Managing Automated Backups

Usage Notes

• Backup files are saved as packages in OBS buckets. Uploading backup files and reading service data both consume bandwidth, so the upload bandwidth of OBS is limited. The upload bandwidth of a single node ranges from 20 MB/s to 70 MB/s.

  For better performance, you need to specify appropriate nodes for an instance and take into account the bandwidth for uploading backups.

• The CPU usage may increase 5% to 15% because uploading backups consumes CPU resources.
• The memory usage may increase by about 300 MB during the upload of backups. The increase depends on the instance's data volume. The increased memory mainly caches data during backup upload and service read. After the backup upload is complete, the memory recovers.
• You can manually modify incremental backups of a GeminiDB Cassandra instance.
• To enable the incremental backup function, choose Service Tickets > Create Service Ticket in the upper right corner of the console and contact the customer service.
• After the incremental backup function is enabled, differential backup is selected by default. To enable PITR, choose Service Tickets > Create Service Ticket in the upper right corner of the console and contact the customer service.

Automated Backup Policy

Automated backups are generated according to a backup policy and saved as packages in OBS buckets to ensure data confidentiality and durability. You are advised to regularly back up your database, in case it becomes faulty or damaged. However, backing up data might affect the database read and write performance so it is recommended that you enable automated backups during off-peak hours.

When you create an instance, an automated backup policy is enabled by default.

Figure 1 Enabling the automated backup policy

Modifying an Automated Backup Policy

1. Log in to the Huawei Cloud console.
2. In the service list, choose Databases > GeminiDB.
3. On the Instances page, click the instance whose backup policy you want to modify and click its name.
4. Choose Backups & Restorations in the navigation pane one the left, and click Modify Backup Policy. In the displayed dialog box, set the backup policy and click OK.

   For details, see Automated Backup Policy.

   Figure 4 Modifying a backup policy
   

5. Check or manage the generated backups on the Backups or Backups & Restorations page.

Viewing Incremental Backups

You can view incremental backups and their size of a GeminiDB Cassandra instance.

• To view the size and records of incremental backups, choose Service Tickets > Create Service Ticket in the upper right corner of the console and contact the customer service.
• You can view incremental backups and their size only after you enable Incremental Backup, or no data is displayed.

1. Log in to the Huawei Cloud console.
2. In the service list, choose Databases > GeminiDB.
3. On the Instances page, click the target instance name to access the Basic Information page.
4. In the navigation pane, choose Backups & Restorations.
5. On the Backups & Restorations page, click Incremental Backup.
   Figure 5 Incremental backup
   

6. View incremental backups and their size.

Disabling Incremental Backup

1. Log in to the Huawei Cloud console.
2. In the service list, choose Databases > GeminiDB.
3. On the Instances page, click the target instance. The Basic Information page is displayed.
4. In the navigation pane, choose Backups & Restorations. On the displayed page, click Modify Backup Policy and click next to Incremental Backup.
   Figure 6 Disabling Incremental Backup
   

Disabling an Automated Backup Policy

1. Log in to the Huawei Cloud console.
2. In the service list, choose Databases > GeminiDB.
3. On the Instances page, locate the instance that you want to disable automated backup for and click its name.
4. Choose Backups & Restorations in the navigation pane one the left, and click Modify Backup Policy.
5. In the displayed dialog box, click and click OK.
   Figure 7 Disabling backup policies
   
   When your disable automated backup, specify whether to delete the automated backups:

   • If you select Delete automated backups, all backup files within the retention period will be deleted. There are no automated backups displayed until you enable automated backup again.
   • If you do not select Delete automated backups, backup files within the retention period will be retained, but you can still manually delete them later if needed. For details, see Deleting an Automated Backup.

   If Automated Backup is disabled, any automated backups in progress stop immediately.

Deleting an Automated Backup

If automated backup is disabled, you can delete stored automated backups to free up storage space.

If automated backup is enabled, the system will delete automated backups when they expire. You cannot delete them manually.

Deleted backups cannot be restored.

• Method 1
  1. Log in to the Huawei Cloud console.
  2. In the service list, choose Databases > GeminiDB.
  3. On the Instances page, click the instance whose automated backups you want to delete and click its name.
  4. Choose Backups & Restorations in the navigation pane on the left, locate the backup you want to delete and click Delete in the Operation column.
  5. In the displayed dialog box, confirm the backup details and click Yes.
• Method 2
  1. Log in to the Huawei Cloud console.
  2. In the service list, choose Databases > GeminiDB.
  3. On the Backups page, locate the backup that you want to delete and click Delete in the Operation column.
  4. In the displayed dialog box, confirm the backup details and click Yes.