For space reclamation operations on disk library, by default, the deduplicated data space reclamation operation is automatically associated with the System created schedule policy for DDB Space Reclamation schedule policy. This schedule policy runs a full space reclamation job every day at 9:00 AM on one active DDB a day. The interval between two consecutive space reclamation jobs on a DDB is set to 30 days. By default, all the deduplication databases are assigned to this System created schedule policy for DDB Space Reclamation, but the space reclamation process runs only on the mount paths that do not support hole drilling. This schedule policy also selects and runs a space reclamation job on those DDB engines on which a full DDB reconstruction job was run.
Note
The schedule policy for DDB space reclamation runs only when the disk free space is lower than the Low Watermark (%) value that is set for the library in the Library Properties (Space Management) dialog box. On Hyperscale storage pools, the schedule policy for DDB space reclamation runs if the amount of free space falls below the value set in the Automatically submit Space Reclamation DDB Verification job when free space on Library is below this percent parameter available in Media Management Configuration: Service Configuration dialog box.
The software uses the default disabled alert No DDB Space Reclamation from past N days to send an alert to the administrators when a DDB space reclamation was not performed on the non-supported sparse files storage in the last 30 days though the storage meets the criteria for space reclamation.