The EMC ® VNX™ File Deduplication and Compression feature increases file storage efficiency by eliminating redundant data from the files stored in the file system, thereby saving storage space and money. For each file system, file-level deduplication gives the Data Mover the ability to process files in order to compress them, and the ability to share the same instance of the data only if they happen to be identical. Deduplication functionality operates on whole files and is applicable to files that are static or nearly static with a last-access time greater than 15 days (default value in systems that use version 5.6.47 or later) or greater than 30 days (default value in systems that use version 5.6.43 through 5.6.46).
For example, if there are 50 unique files in a file system that can be deduplicated, 50 unique files will still exist but the data will be compressed, yielding space savings of up to 50 percent. If there are 70 identical copies of a presentation document in a file system, 70 files will still exist but they will all share the same file data. In the second example, the data usage will decrease by a factor of almost 70. In addition, the one instance of the file data shared by the 70 files will also be compressed, providing further space savings.
To learn more about File Deduplication and Compression please reference the following document:
On Celerra NS series with dedupe ON, we need to do Volume Babsed Backup (VBB) and it does not support individual file restores. Will have to depened on snapsure to do individual file restores. Is that still the case with VNX?