Media Management Configuration: Deduplication

Use the following parameters to establish Deduplication parameters.



Config param to convert reconstruction to full automatically on invalid DDB backup job

Definition: Specifies that the DDB reconstruction job is transformed to full reconstruction job when the last DDB backup job is found as invalid.

Default Value: 0

Range: 0 (disabled) or 1 (enabled)

Config param to mark jobs verification failed for read errors

Definition: Specifies that the Data Verification Status of backup job is marked as Failed when the data chunk is found with read errors during restore, auxiliary copy or synthetic full operations.

Default Value: 1

Range: 0 (disabled) or 1 (enabled)

Days to keep DDB on source location after successful move partition job

Definition: Specifies the number of days to keep DDB files on the source MediaAgent after successful move partition job.

Default Value: 0 day

Range: 0 to 30 days

DDB Reconstruction prune replay batch count

Definition: Specifies the number of prunable data blocks sent in a batch to deduplication database.

Default Value: 1000

Range: 1 to 100,000

DDB Reconstruction prune replay retry count

Definition: Specifies the number of times DDB Reconstruction has to replay the prune data blocks before reporting failure.

Default Value: 100,000

Range: 1 to 100,000

Usage: Controls the retry limit for DDB reconstruction failure.

Deduplication pruning batch size

Definition: Specifies the number of job records sent in a batch for pruning.

Default Value: 1000

Range: 0 to 100,000

Usage: This is an advanced parameter that controls the number of job records sent for deduplication pruning from the CommServe to the MediaAgent.

Enable garbage collection and pruning log journaling options

Definition: Specifies that the following options will be enabled in the Storage Policy Copy Properties dialog box on the Deduplication tab :

  • Enable garbage collection

  • Enable pruning logs for reconstruction

    Default Value: 0

    Range: 0 (disabled) or 1 (enabled)

Enable Index Free Restores for DDB Reconstruction

Definition: Specifies the regular DDB reconstruction job to use index free restore.

Default Value: 0

Range: 0 (disabled) or 1 (enabled)

Usage: If you encounter any issues with the DDB reconstruction that uses index based restore by default, set the value for this parameter to 1 to perform DDB reconstruction job using index free restore. After performing the DDB reconstruction, it is recommended to turn off this parameter by setting the value to 0 again.

Option to retain extra DDB backups for every partition

Definition: Specifies the number of DDB backups that can be retained for each partition.

Default Value: 1

Range: 1 to 4

Usage: If multiple DDB backups for each partition are retained and the latest DDB backup is corrupted, then you can use one of the retained DDB backups for DDB reconstruction.