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 vault capacity:

1. Prepare the following data:

Disk capacity (GB): a

Backup retention period (days): b

Backup frequency (days): c

Daily changed data volume (GB): d

2. Calculate the vault capacity using the following formula:

Vault capacity: (GB) = [a + (b/c) x d] x 120%

• If you configure to keep backups by quantity, you can convert the number of retained backups to the backup retention period and then use the preceding formula. For example, if a company backs up data once a day and configures to retain seven backups, the retention period can be considered as seven days.
• Deleted, added, and changed data is all included when the daily changed data volume is calculated.

Example

A financial company has an 800 GB cloud server, has used 200 GB of it, and its daily data changes are 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 a month. You can calculate the capacity of the server backup vault as follows:

Vault capacity = [800 + (30/1) x 10] x 120% = 1,320 GB