BACKGROUND IMAGE: iSTOCK/GETTY IMAGES

Storage

Managing and protecting all enterprise data

iSTOCK/GETTY IMAGES

Hashing Makes a Comeback

Hashing is back

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 cost-effectively transferring data between central and remote offices.

Article 5 of 17

Dig Deeper on Storage optimization

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

Get More Storage

Access to all of our back issues View All

-ADS BY GOOGLE

SearchDisasterRecovery

SearchDataBackup

SearchConvergedInfrastructure

Close