Tag Archives: inline

Defragmentation, rehydration and deduplication

W. Curtis Preston recently blogged about The Rehydration Myth. In his post he discusses how restore performance on deduplicated data declines because of the method used to reassemble the fragmented deduplicated data on disk. He also addresses the ways various technologies attempt to overcome these issues, including disk caching, forward referencing (used by SEPATON’s DeltaStor […]

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Data Domain Announcement

Data Domain recently announced that their new OS release dramatically improved appliance performance. On the surface, the announcement seems compelling, but upon further review, it creates a number of questions. Performance Improvement Deduplication software such as Data Domain’s is complex and can contain hundreds of thousands of interrelated lines of code. As products mature, companies […]

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NetApp Dedupe: The Worst of Inline and Post-process Deduplication

NetApp finally entered the world of deduplication in data protection. While they have supported a flavor of the technology in their filers since May 2007, they have never launched the technology for their VTL. Why? Because their VTL does not use any of the core filer IP. It relies on an entirely separate software architecture […]

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Tradeshow perspectives

I spent last week at a tradeshow in New York. These events are interesting because of the various end user perspectives. Those of us in the industry often get embroiled in the minutiae of products and features, and so it is very useful to understand the views of the end users on the show floor. […]

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