Administrator Guide
Deduplication
Deduplication reduces the space used by a volume by identifying and deleting duplicate pages. Deduplication requires SSD drives.
Apply Deduplication With Compression to a Volume
Apply Deduplication with Compression to reduce the size of the volume. Deduplication and compression run during daily Data Progression.
Prerequisite
Allow Data Reduction Selection must be enabled in the Preferences tab of the Edit Storage Center Settings dialog box.
About this task
NOTE: The amount of space saved by Data Reduction is determined by the amount of data eligible for Data Reduction on the
volume compared to the total amount of space used by that data on disk after Data Reduction.
Steps
1 If you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane.
2
From the STORAGE menu, select Volumes.
The Volumes view is displayed.
3 In the Volumes view, select the volume you want to modify.
4 Click (Edit).
The Edit Volume dialog box opens.
5 Expand Data Reduction.
6 From the Data Reduction Prole drop-down menu, select Deduplication with Compression.
View Amount of Space Saved by Data Reduction
The total amount of space saved by Data Reduction depends on the amount of data eligible for data reduction and the type of data being
processed. Certain types of data will be reduced more eectively than others. The amount of volume data eligible for data reduction is
determined by the size of the data frozen by snapshots, and the Data Reduction Input setting.
Data Savings Ratios
System Data Reduction Ratio and System Data Eciency Ratio show the data savings on the Storage Center using the available disk
space-saving features.
System Data Reduction Ratio – Compares the amount of space that would be used by pages that are eligible for compression and
deduplication to the amount of space actually used by those pages after Storage Center applies Data Reduction.
System Data Eciency Ratio – Indicates the eciency of compression, deduplication, RAID, and Thin Provisioning
View Amount of Space Saved for a Storage Type
Storage Center determines the total percentage of space saved for all volumes in a storage type by comparing the amount of space
processed by Data Reduction to the amount of space used after data reduction.
1 If you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane.
2
From the STORAGE menu, select Storage Types.
The Storage Types view is displayed.
Storage Center Administration
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