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Efficient replacement of nonuniform objects in Web caches

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4 Author(s)
Hyokyung Bahn ; Seoul Nat. Univ., South Korea ; Kern Koh ; Noh, S.H. ; Lyul, S.M.

Cache performance depends heavily on replacement algorithms, which dynamically select a suitable subset of objects for caching in a finite space. Developing such algorithms for wide-area distributed environments is challenging because, unlike traditional paging systems, retrieval costs and object sizes are not necessarily uniform. In a uniform caching environment, a replacement algorithm generally seeks to reduce cache misses, usually by replacing an object with the least likelihood of re-reference. In contrast, reducing total cost incurred due to cache misses is more important in nonuniform caching environments. The authors present the least-unified value algorithm, which performs better than existing algorithms for replacing nonuniform data objects in wide-area distributed environments

Published in:

Computer  (Volume:35 ,  Issue: 6 )

Date of Publication:

Jun 2002

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