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Nonstop data protection
This article is part of the Vol. 3 No. 8 October 2004 issue of Storage magazine
This article first appeared in "Storage" magazine in their October issue. For more articles of this type, please visit www.storagemagazine.com. The latest continuous data protection (CDP), or continuous backup, products promise administrators the ability to recover from a point in time -- going back minutes, hours, days or even weeks -- on a range of platforms. They offer the flexibility of restoring individual logical unit numbers (LUNs), defined volumes or single files. CDP products differ from point-in-time snapshots in two key ways. First, data changes are recorded continually, as opposed to halting an application's I/O activity to create the data snap. And second, data changes are stored incrementally rather than storing numerous data images. A growing number of products also provide the ability to: Recover from any previous point in the past, rather than certain fixed points. Create a central data store that multiple servers can use for backup and recovery. Because of the differences among CDP product offerings, ...
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