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1997
ACM

Page Replacement with Multi-Size Pages and Applications to Web Caching

11 years 5 months ago
Page Replacement with Multi-Size Pages and Applications to Web Caching
We consider the paging problem where the pages have varying size. This problem has applications to page replacement policies for caches containing World Wide Web documents. We consider two models for the cost of an algorithm on a request sequence. In the rst, (the Fault model) the goal is to minimize the number of page faults. In the second, (the Bit model) the goal is to minimize the total number of bits that have to be read into the cache. We show o ine algorithms for both cost models that obtain approximation factors of O(logk), where k is the ratio of the size of the cache to the size of the smallest page. We show randomized online algorithms for both cost models that are O(log2 k)-competitive. In addition, if the input sequence is generated by a known distribution, we show an algorithm for the Fault model whose expected cost is within a factor of O(logk) of any other online algorithm.
Sandy Irani
Added 07 Aug 2010
Updated 07 Aug 2010
Type Conference
Year 1997
Where STOC
Authors Sandy Irani
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