Extended retention rules allow you to keep specific full (or synthetic full) backups for an additional period of time.
Extended retention rules allow you to define three additional "extended" retention periods for full (or synthetic full) backups. For example:
- You may want to retain your weekly full backups for 30 days.
- You may want to retain your monthly full backup for 90 days.
- You may want to retain your yearly full backup for 365 days.
A backup job will be selected for extended retention based on its start time. For example: If a backup job starts at 11:55 pm on August 31st and ends at 1 am on September 1st, then it will be selected as the last full backup for the month of August and will be picked up for extended retention.
In all other cases, we recommend you to use Auxiliary Copy for extended storage as it actually creates another physical copy of the data, thereby reducing the risk of data loss due to media failure.
Procedure: Setting Up Extended Retention Rules
In your Scenario, the Extended Retention is set to 90 days (3 months) for Weekly Fulls and this will pick the Weekly Fulls that runs starting from Friday and will retain them on this copy for 3months.
However, extended retention could be set differently based on Agent types.
For example, Database Agents have unique retention rules and behaviors for logs.
1.) What Agent e.g SQL, Oracle, WFS are you backing up on this Client associated to the Secondary Storage Policy Copy
Please let me know if you have any questions.