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least recently used |
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least recently used [′lēst ¦rē·sənt·lē ‚yüzed] (computer science) A technique for using main storage efficiently, in which new data replace data in storage locations that have not been accessed for the longest period, as determined by an algorithm.
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With policy-based retention of data on the disk cache, the least recently used data is purged based on watermarks. As disk volumes on network servers fill with information, the oldest, least recently used information is moved to less expensive "layers" of storage peripherals such as disk drives, optical jukeboxes, and tape libraries to optimize both the cost of storage and information access time. |
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