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Access "Hashing Makes a Comeback"

Published: 17 Oct 2012
Storage managers give thumbs up to IP storage

This article is part of the Vol. 3 No. 2 April 2004 issue of Storage managers give thumbs up to IP storage

In the mainframe's heyday, disk was expensive, prompting systems vendors to use hashing algorithms to trim down their data stores. By transforming a string of characters into a shorter fixed-length value that represents the original string, hashing can ensure that a character string is only stored once. These days, storage is cheap, but data is plentiful, so storage vendors have once again turned to hashing to keep data capacities under control. The best-known example of this trend is EMC's archive solution, Centera, but several innovative startups have also resurrected the hash. Avamar uses a hash function to reduce the amount of data it stores in its Axion backup and recovery arrays, while Permabit uses it as the foundation of a software-based compliance repository. But Marc Duvoisin, national director of enterprise servers and storage for Dimension Data, in Reston, VA, thinks hashing's real promise lies in remote office consolidation. "Networking has gotten cheaper, but not that cheap," he says. And as of yet, no one has solved the problem of ... Access >>>

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What's Inside

Features
    • DWDM a Boon for the Few

    • Future Looks Hazy For Enterprise Drives

    • Hashing Makes a Comeback

      Hashing is back

    • IP storage delivers by Johanna Ambrosio

      Despite all the FUD surrounding IP SANs, early users say IP-based storage isn't all that difficult to manage and that performance is sufficient. The key is knowing what applications IP SANs should be used for.

    • Wrestling with regulations by Bill O'Brien

      In the health care industry, complicated regulations such as HIPAA, combined with new technologies that require enormous amounts of storage, are driving storage managers to the emergency room.

    • Get control of capacity

      Although storage resource management tools can be complicated to implement, they're a better alternative to breaking the bank and rushing out to purchase more storage. Get precise with your vendors on what you need and you'll wind up with better results.

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