Scalability may be a dedupe dilemma

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New products from companies like NEC Corp. of America and Sepaton offer a more scalable, clustered and multinode architecture. Clustered architectures allow companies to add new deduplication appliances to their backup environment, which can then access the pattern matches created by the first appliance.

Garrett also warns that backup software such as IBM's Tivoli Storage Manager (TSM), which may compress data prior to storing it on a deduplication appliance, can potentially negate the effectiveness of a deduplication appliance. Because deduplication appliances do compression as part of the data-reduction process, compressing data prior to sending it to the deduplication appliance impacts the deduplication appliance's ability to recognize and match patterns.

"Users may not receive as much benefit with TSM because it is already doing some of the same magic as the deduplication appliance," says Garrett.

--Jerome M. Wendt

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This was first published in November 2007

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