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Cache management method and apparatus for shared, sequentially-accessed, data

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  • Cache management method and apparatus for shared, sequentially-accessed, data

Rahm, E.

Cache management method and apparatus for shared, sequentially-accessed, data

US Patent 5,150,472, Sep. 1992

1992

Andere

Abstract

Page management mechanisms provide candidates for page stealing and prefetching from a main storage data cache of shared data when the jobs sharing the data are accessing it in a sequential manner. Pages are stolen behind the first reader in the cache, and thereafter at locations least likely to be soon re-referenced by trailing readers. A "clustering" of readers may be promoted to reduce I/O contention. Prefetching is carried out so that the pages most likely to be soon referenced by one of the readers are brought into the cache.

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