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data deduplication
Last modified: Thursday, August 31, 2006 

In storage technology, deduplication essentially refers to the elimination of redundant data. In the deduplication process, duplicate data is deleted, leaving only one copy of the data to be stored. However, indexing of all data is still retained should that data ever be required. Deduplication is able to reduce the required storage capacity since only the unique data is stored. Deduplication is also also written as de-duplication, and is synonymous with data reduction or commonality factoring.
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