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Configure deduplication

Updated: November 1, 2013

Applies To: System Center 2012 R2 Data Protection Manager, System Center 2012 SP1 - Data Protection Manager

Data deduplication is a new feature in Windows Server 2012. This feature finds and removes duplication within data on a volume while ensuring that the data remains correct and complete. This makes it possible to store more file data in less space on the volume. Data deduplication is implemented per volume , which means that Windows Server 2012 allows data deduplication to be applied to a whole volume and not to selected files or folders only. Data Protection Manager (DPM) supports protection for Windows Server 2012 volumes that have the deduplication feature enabled.

WarningWarning
You must not enable the data deduplication feature on a DPM disk.

Protect volumes with deduplication

The process to protect a volume with data deduplication is the same as protecting a normal volume. However, you must consider the following actions when you protect a volume that has the deduplication feature enabled.

ImportantImportant
Protection of volumes with data deduplication enabled is supported only in System Center 2012 SP1 DPM and later versions.

  • You must enable the Data Deduplication role on the DPM server to protect deduplicated volumes.

  • If the entire volume is protected, then DPM provides only optimal protection. If only partial deduplicated volume is protected, then DPM will provide normal backup.

  • If you protect data to tape, the data will be stored in unoptimized form.

  • End-user recovery for deduplicated volumes will be done in unoptimized form.

  • Protection for volumes with data deduplication enabled is not supported for online backup to Windows Azure Online Backup.

When you protect a volume with data deduplication enabled, DPM leverages the benefits of the feature. Specifically, the data from such a volume is stored optimally, and network transfers of the also happen in an optimized form.

Recover volumes with deduplication

The process to recover a volume with data deduplication enabled is the same as recovering a normal volume. However, you must consider the following actions when you perform volume recovery.

  • To do full volume (optimal) recovery, you must recover to an empty and formatted volume, and you should not enable the deduplication feature on the target volume.

  • If you recover an item by using Item-level recovery, it will be recovered in an unoptimized state.

  • If you recover the entire deduplicated volume, the recovery will be optimized. If you recover only selected files and folders, , the recovery will not be optimized.

  • You cannot recover a deduplicated volume to a computer that does not have the Windows Server 8 and later operating systems.

See Also

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For additional resources, see Information and Support for System Center 2012.

Tip: Use this query to find online documentation in the TechNet Library for System Center 2012. For instructions and examples, see Search the System Center 2012 Documentation Library.
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