White Papers for Federal Information Security Management Act (FISMA)

The Dangers of Data De-duplication

Vaultscape

Data compression is a very well established methodology for reducing the needs for storage. There are several flavors including Lossy (MPEG for example), Lossless (ZIP for example) and more recently Deduplication. Lossy is useful for movies where data size is critical if the entire movie is to be stored on a relatively small device; Lossless is vital where the data must be restored exactly as it was prior to compression. Deduplication is useful where more real time compression / decompression are required with the understanding that data may be lost in the process. People are looking to deduplication for the future of data storage in order to reduce the amount of drives spinning which in turn reduces data center footprint for storage and, of course, reduced power needs. The problem with deduplication is, however, the real potential for data loss.

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