Study on Efficiency of Full-Text Retrieval Based on Lucene

Through researching and analyzing the structure of lucene package, we have developed a full-text information retrieval system on the basis of lucene full-text retrieval. After mastering index structure and principle, we increase the size of index buffer in memory and decrease the frequency of writing index to disk by a specific algorithm. What is more, we optimize index by merging it in memory and on disk. As a result, the efficiency of creating index for 70000 documents has been improved by 55.1% at the best circumstances, and that of information retrieval for 70000 documents has been improved by 15.6% at the best circumstances.