How Large of a Vault Do I Need?

Manual Backup Scenario

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

Automatic Backup Scenario

If automatic backup is required, use the following formula to estimate the required capacity of the vault to be created:

Vault capacity (GB) = [Disk capacity (GB) + Backup retention period (days)/Backup cycle (days) x Daily data volume changes (GB)] x 120%

If you set that backups are retained based on backup quantity, you can calculate the vault capacity you need by converting the number of retained backups to backup retention period. For example, if a company backs up data once a day and the number of retained backups is set to 7, then the retention period can be deemed as 7 days.

Example

Financial company A has an 800 GB cloud server and has used 200 GB of it. Use the disk capacity (800 GB) rather that the used capacity for calculation. The daily data change volume is about 10 GB. As scheduled, the company's data is backed up twice at 02:00 and 20:00 every day, and backups are retained for one month. The capacity of a server backup vault required by the company can be estimated using the following formula:

Required vault capacity = [(800+30/(1/2) x 10] x 120% = 1,680 GB