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Vol. 1 No. 4 June 2002

Surprise! cheap disks cure slow backup

Just when you thought you knew how to design a backup system - everything changes. A new category of disk array products promises to revolutionize how backups are performed. However, before describing how they work, and what they cost, it's appropriate to explain the problems that they're trying to solve. And it's important to review why backups are performed, and why they are usually sent to tape. Everyone knows that the only reason we perform backups is to be able to perform recoveries. Recoveries are done for three reasons: To restore damaged files, file systems or individual systems to their point of failure. Most real-life recoveries aren't done because a data center has been destroyed, or because someone needs a file that was deleted over a year ago. Most recoveries are performed because someone inadvertently deleted an important file, a RAID array was damaged or a database administrator accidentally dropped the wrong table. To restore a damaged data center to its last available off-site backup. Although recent events have...

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Features in this issue

  • Now, That's a Cluster!

    Lawrence Livermore National Labs is pushing the envelope with a new storage cluster that mates 115TB of networked disk with a massive cluster of 600 dual Pentium 4 servers.

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