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Content-Addressable Storage: Page 4 of 6

Acronyms Across America

In one of the curious dichotomies that happens primarily in the technology sphere, the market for what CAS provides is getting red hot just as the term is losing its luster. Make no mistake, the technology behind CAS is relevant and being implemented as the foundation of archival systems by virtually every major storage vendor. But some are avoiding the term, choosing to focus on sophisticated archival-management systems that have CAS as their foundation. That's OK--storage and archiving are confusing enough without tossing in another term. We're less concerned with labels than we are with making sure you understand the ramifications of adding CAS technology to your archival strategy.

First, let's examine its main benefits: the ability to track changes to business data, which provides a verifiable method of ensuring that data hasn't been altered for legal-discovery purposes; the ability to use metadata to track disparate file types, which lets IT migrate data to appropriate storage media as needed and retrieve it efficiently; and the ability to remove duplicate data, which can save disk space.

» Change tracking: By using change tracking, companies can show the evolution of a document. This is useful during legal discovery. Change tracking and content addresses are created from a hash routine. Because the paranoia police have declared hashing unreliable, nearly every CAS system allows for a new hashing algorithm to be applied if the one in use proves out of date.