文件名称:
RankPreserving TwoLevel Caching for Scalable Search Engines
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文件大小: 227kb
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上传时间: 2013-06-19
详细说明： We present an effective caching scheme that reduces the computing and I/O requirements of a Web search engine without altering its ranking characteristics. The novelty is a two-level caching scheme that simultaneously combines cached query results and cached inverted lists on a real case search engine. A set of log queries are used to measure and compare the performance and the scalability of the search engine with no cache, with the cache for query results, with the cache for inverted lists, and with the two-level cache. Experi mental results show that the two-level cache is su- perior, and that it allows increasing the maximum number of queries processed per second by a factor of three, while preserving the response time. These results are new, have not been reported before, and demonstrate the importance of advanced caching schemes for real case search engines. ...展开收缩
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