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The search engine discussed in this paper is a directory search engine. It is used to solve issues of cache and performance optimization. It provides website search services for education resources of primary and secondary schools. Optimizations from the architecture design to underlying details of each level are as follows: TCP protocol and epoll multiplexer were used, search words correction mechanism was adopted for error correction and association recommendation, multiple index coordination mechanisms were used instead of the traditional single index, Redis was used to handle query history cache instead of traditional memcached systems. The experimental data is from Fudan University corpus. The test method is a comparison between longitudinal and traversal tests. It is found that the average service time has been reduced from 5ms to less than 1ms; the actual performance has been improved nearly 100 times when compared with the previous average results.
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