PDFIntelligent Disk Space Management (IDSM)
Intelligent automation saves you disk space, time and money

• Automaticaly manage backups, Recovery Points and disk space
• "Setup and Forget"

The DataSaver includes an advanced feature called Intelligent Disk Space Management (IDSM) that automatically and intelligently manages your disk space usage on the DataSaver.

As more and more Recovery Points are created, the DataSaver will have less and less available disk space for new Recovery Points or even new clients. However, our philosophy is that every Recovery Point being created is important, and so the DataSaver will automatically try to free up disk space to ensure that the new Recovery Point can be created.

Reuse, Recycle, and Rotate
When a client tries to create a Recovery Point, and the DataSaver does not have enough free disk space available, it will go through all Recovery Points for all clients in the entire system, and remove the oldest Recovery Point. This process will be repeated until enough space is freed up so that the new Recovery Point can be safely created. Of course, certain restrictions are in place that ensures that every client will always have at least one valid Recovery Point of its own.

Intelligent Disk Space Management - Recovery Point Rotation

New Recovery Point

Figure 1: New recovery point requested


Figure 2: Oldest recovery point rotated

Successful Creation

Figure 3: New recovery point created

Golden and Locked Recovery Points
In order to ensure that every client has a working Recovery Point, clients with only one Recovery Point have what is known as a "Golden" Recovery Point. This Recovery Point will never be automatically removed by the system even if a new Recovery Point requires more disk space. Similarly, if an Administrator marks a Recovery Point as "Locked", it cannot be removed until it has been unlocked.

Golden Recovery Point

Locked Recovery Point

Figure 4: "Golden" and Locked recovery points will not be rotated or removed

Recovery Point Limits
Sometimes, certain clients do not need that many Recovery Points. The Administrator can set a maximum limit on the number of Recovery Points a client can have. Should a new Recovery Point being created exceed the client's Recovery Point Limit, the oldest Recovery Point for the client will be automatically removed.

Recovery Point Limit

Figure 5: Client A has a limit of 5 Recovery Points

Out of Disk Space, REALLY!
Under normal circumstances, the DataSaver will run happily and continue to create new and rotate old Recovery Points automatically and intelligently. However, if the DataSaver detects that it is running low on disk space, it will stop performing any Continuous Incremental Backups and snapshot Recovery Points. An email alert will then be sent to the Administrator. This situation may arise due to the fact that too many clients are using a particular DataSaver to create Recovery Points, or the sizing of the DataSaver is inadequate to support the large disk space requirements of the clients. Another possibility is that too many Locked or "Golden" Recovery Points are being kept. If this should happen, you can remove some of the Locked Recovery Points or set Recovery Point limits on each client to limit the disk space usage for each client. Finally, you can also reduce the number of clients using that particular DataSaver.