The Apsara PolarDB backup and restore functions are available now, and you can use them for free. What's more, from 10:00 am (Beijing Time) on June 10, 2020, Apsara PolarDB will start charging for the storage space used by the backup files. For some backup methods, you can enjoy certain discounts.
Starting at 10:00 am on June 10, 2020 (Beijing Time), you will be charged for the storage space used by backup files in Apsara PolarDB.
All Apsara PolarDB clusters.
You can store backups for long-term use in Apsara PolarDB. You can also set the backup feature to retain backups of a cluster after you delete the cluster. This helps avoid data loss caused by user errors.
You can enable automatic backup of cluster and log data, or manually back up cluster data.
|Level-1 backup (data backup)||
|Level-2 backup (data backup)||
|Backup type||Free quota||Billing method|
|Level-1 backup||Database storage usage × 50%
To check the database storage usage, log on to the Apsara for PolarDB console, and click the cluster name to navigate to the Overview page.
|Storage fee per hour = (The total physical storage of level-1 backups - Free quota)
× Unit price per hour
For example, if the total physical storage of the level-1 backups is 700 GB and database storage usage is 1,000 GB, the storage fee per hour is USD 0.6.
The fee is calculated based on the following formula: [700 GB - (1,000 GB × 50%)] × USD 0.000464 = USD 0.0928
|Level-2 backup||None||Storage fee per hour = The total physical storage of level-2 backups × Unit price
For example: The total physical storage of level-2 backups is 1,000 GB. The storage fee per hour is USD 0.21.
The fee is calculated based on the following formula: 1,000 GB × USD 0.0000325 = USD 0.0325
|Log backup||100 GB||Storage fee per hour = (The total physical storage of log backups - 100 GB) × Unit
price per hour
For example: The total physical storage of log backups is 1,000 GB. The storage fee per hour is USD 0.189.
The fee is calculated based on the following formula: (1,000 GB - 100 GB) × USD 0.0000325 = USD 0.02925
|Region||Level-1 backup||Level-2 backup||Log backup|
|Mainland China||USD 0.000464/GB/hour||USD 0.0000325/GB/hour||USD 0.0000325/GB/hour|
|China (Hong Kong) and regions outside China||USD 0.000650/GB/hour||USD 0.0000455/GB/hour||USD 0.0000455/GB/hour|
- Does the total physical storage of level-1 backups equal the sum of all backups?
The total physical storage of level-1 backups does not equal the sum of all backups. The total physical storage of level-1 backups is displayed in the ① section, as shown in the following figure.
- Why is the total physical storage of level-1 backups smaller than the size of a single
Level-1 backups in Apsara PolarDB are measured by using two methods: the physical storage of all backups and the logical storage of each backup. Apsara PolarDB uses snapshot chains to store level-1 backups. Each data block is replicated only once. Therefore, the physical storage of all level-1 backups is smaller than the total logical storage of all level-1 backups, or sometimes even smaller than the logical storage of a single backup.
- How are backups in Apsara PolarDB backup billed?
Storage fees are charged for level-1 backups, level-2 backups, and log backups. By default, level-1 backup and log backup are enabled, but level-2 backup is disabled. Alibaba Cloud also offers free storage for level-1 backups and log backups.
- What is the billing method of level-1 backups?
Storage fee per hour = (Total physical storage of level-1 backups - Database storage usage x 50%) x Unit price per hour. For example, the total physical storage of level-1 backups of an Apsara PolarDB cluster is 700 GB and the database storage usage is 1,000 GB. Then, the storage fee per hour is calculated as (700 GB - 500 GB) × USD 0.000464/GB = USD 0.0928.
- Can I use a storage plan to deduct the storage fee?
No, a storage plan can only be used to deduct storage fees incurred by the stored data. It is not applicable to backups.