Changing the Deduplication Database Location

You can change the location of the partition(s) of active or sealed DDB on the existing MediaAgent. This is useful in the following scenarios:

  • Volume hosting the DDB does not have enough space and you want to move the DDB to another volume that has adequate space
  • Move a DDB to a high-performing disk storage media

Before You Begin

Before changing the location of the active deduplication database (DDB) make sure that:

  • The DDB partition contains data. You cannot move an empty DDB partition.
    To move empty DDB partitions, see Recovering Permanently Offline Deduplication Database Partitions.
  • No DDB backup or DDB reconstruction jobs are running to the storage policy copy that is associated with the DDB move.
  • Ensure that the destination location has at least 5% more free space to host the DDB.
  • The involved source and destination MediaAgent are online.


  1. From the CommCell Browser, expand Storage Resources > Deduplication Engines > storage_policy_copy.
  2. Right-click the deduplication_database and then click Move Partitions.

  3. In the Target MediaAgent And Partition Path column, click Choose Path to change the location of the appropriate partition.
  4. From the MediaAgent list, select the existing MediaAgent.
  5. In the Partition Path, enter the file path where you want to locate the DDB, and then click OK.


    • If you have a DDB partition path that contains an active store and sealed stores, moving an active store will not move the sealed stores. You must move each sealed store separately using DDB Move operation.
    • Do not move the DDB under the software installation directory.
  6. Click OK.
  7. In the confirmation popup that appears, click Yes.


A Move Partition job in the Job Controller window. The job copies the DDB files from the existing location to the new specified location.


  • If you have changed the location of both the partitions, for each partition a separate job will be displayed.
  • After the successful completion of the job, the software immediately releases the space on the source location in few minutes.

    If you want, you can specify the number of days to keep the files on the source location in the Days to keep DDB on source location after successful move partition job parameter in the Deduplication tab of the Media Management Configuration dialog box.

  • If a DDB file or source path is open or being used by other program, then the deletion of the DDB files on the source location is prevented.

Last modified: 7/3/2018 6:16:25 AM