COSAR: A Pr´ ecis Cache Manager
msra
摘要
Precis is a class of cache managers that stores and re- trieves the final results of a time consuming operation that may use data from disparate sources. Examples include the results of an aggregate query, serialized instances of a data structure that contains results of different queries and computations used to generate a dynamic HTML page, etc. It is a high throughput, low latency key-value cache manager designed to scale a large data intensive web application. Example systems include memcached and COSt AwaRe (COSAR) cache manager. In this paper, we present the implementation details of COSAR and its vari- ants of LRU, LRU-2, and GreedyDual-Size cache replace- ment techniques. We compare COSARwith memcached that employs the classical LRU replacement technique, showing the merits of its proposed replacement techniques.
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