How Large a Vault Do I Need?

Manual Backup Scenario

If only manual backup is required, you are advised to set the vault capacity to the total capacity of the resources you want to back up.

Automatic Backup Scenario

If automatic backup is required, you are advised to set the vault capacity to twice the total capacity of the resources you want to back up. Alternatively, you can use the following formula to estimate the capacity of the vault to be created:

1. Prepare the following data:

Disk capacity (GB): a

Backup retention period (days): b

Daily changed data volume (GB): c

2. Calculate the vault capacity using the following formula:

Vault capacity (GB) = (a + b x c) x 200%

• If you configure retention by backup quantity, convert the number of retained backups into a retention period before applying this formula. For example, if a company performs daily backups and retains seven backups, the retention period is seven days.
• When calculating the daily changed-data volume, all data that is added, deleted, or modified is included.

Example

A financial company has purchased an 800-GB cloud server, of which 200 GB is currently in use. Its daily data-change volume is about 10 GB. The company performs scheduled backups twice a day at 02:00 and 20:00, and backups are retained for 30 days.

Disk capacity (GB): 800 GB (Note that the disk capacity is the server capacity, not the used capacity.)

Backup retention period (days): 30 days

Daily changed data volume (GB): 10 GB

You can calculate the capacity of the server backup vault as follows:

Vault capacity (GB) = (Disk capacity + Backup retention period x Daily changed data volume) x 200% = (800 + 30 x 10) x 200% = 2,200 GB