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Content-Addressable Storage: Page 5 of 6

The hashing function is the primary bottleneck of a CAS system in terms of performance, but many vendors are dedicating hardware to hashing functions or conducting background hashing during non-peak usage.

» Metadata: When an enterprise has a rich metadata environment, the possibilities for search, categorization and mining of vital data extend as far as the eye can see. Location-addressable OSs don't store enough metadata to be useful in archiving. CAS solves serves as the foundation by which archiving operations can be performed.

CAS addresses other problems inherent in long-term archiving, for example, media rot. Media rot is not simply the degradation of physical storage media, it also defines the ephemeral nature of technology. Many mediums last much longer than the equipment used to read them, for example. CAS makes it easy to move data from one repository to another, be that disk, optical or tape, eliminating most media rot issues. For more on media rot, see Strategic Info Management: Long-Term Storage .

» De-duplication: Data de-duplication--when only one copy of a given file is kept on the storage system--is not yet universally available on CAS devices. That's unfortunate because the implications for the efficient use of storage and cost savings are clear. We recommend asking about de-duplication if you're considering a device that has CAS functionality.