Four Must Ask Questions About Metadata and Deduplication
22. Dec, 2009 
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When backing up data to a deduplication system, two types of data are generated. The first comprises objects being protected such as the Word documents, databases or Exchange message stores. These files will be deduplicated and for simplicity I will call this “object storage”. The second type of data generated is metadata. This is information that is used by the deduplication software to recognize redundancies and potentially re-hydrate data in the case of restoration. These two types of data are critical and are typically required for writing the data to the system and potentially reading data. Here are four key questions that you should ask about protecting metadata.
