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The Data Domain appliance uses inline deduplication, which performs data reduction before the data is stored on the disk. This means the data can be replicated or otherwise managed immediately on hitting the disk. But it takes a performance hit in the process (see "Different flavors of deduplication," above).
Once Milone chose Data Domain, the implementation went without a hitch. "The Data Domain appliance just attached to our backup server," he says. The IT staff handled most of the deployment with the help of a Data Domain engineer, who spent a day preparing the environment and returned a few days later to verify that everything went in correctly.
Each D2D backup appliance handles the servers at its location. In addition, data at Sterling is replicated to Shea Stadium. The organization, however, hasn't eliminated tape completely. "We still do tapes at Shea," says Milone. That will end with the next phase, which involves either replicating Shea Stadium backups to Sterling or, more likely, to a third Sterling property that will house another Data Domain appliance. At that point, both data centers will replicate to the third site and tape will disappear.
For now, data backups are happening faster and are more reliable than ever. "My staff loves it," says Milone. Whether the Mets win or lose, "I sleep a lot better now," he says.
This was first published in March 2008