Method for dynamically and efficiently caching objects received from an application server by a client computer by subdividing cache memory blocks into equally-sized sub-blocks

摘要

A method for dynamically caching data objects in a logical cache memory begins by organizing the logical cache memory into a set of maximally equally-sized, contiguous pages that begin at a logical cache base address. Any one of the maximal size logical cache pages may be dynamically subdivided into a set of smaller pages of equal size. The smaller size pages cache data objects having a smaller size than the maximum possible data object size. Each subdivided page stores only those smaller size data objects. The logical address for a page is mapped to at least a maximal size page index identifying the position of the maximal size logical page in the cache and, if the page is a smaller size page, the page location is also mapped to a smaller size page index which identifies a particular one of the smaller size pages located within a maximal size page. Pages are dynamically reconfigured based on a least- recently-used policy. A maximal size page may be reconfigured to provide for storage of multiple smaller sized pages and a set of smaller sized pages may be reconfigured to provide storage for a maximal size page. In one aspect, maximally sized pages may be chained together to provide for storage of data objects which exceed the size of the pages. Chained pages may be contiguous or non-contiguous.