用汉语几句话就搞定的东西，非得叽叽歪歪整这么一段。洋文一个字，烂。。。
2010/7/3 Karl Wettin <karl.wet...@gmail.com> > > 2 jul 2010 kl. 08.32 skrev Li Li: > > > I have an index of >> about 8,000,000 document and the current index size is about 30GB. Is >> it possbile to use this contrib to speed up my search? I have enough >> memory for it. >> > > > In order to answer your question you'll need to benchmark using a lot of > typical queries. My guess is that it will probably be about as fast as a > RAMDirectory while consuming a lot more memory. It's hard to say for sure > though. > > II is faster than RD mainly due to the need for RD to unmarshall > information from a byte stream to java instances, hence the name. As the > index grows the time spent in RD unmarshalling will shrink compared to the > time spent seeking (mainly in DocsEnum/DocsAndPositionsEnum) and scoring > documents. Thus executing queries on a large index using terms that are only > available in a small portion of the documents should be faster on II than on > RD, while exeuting queries using frequently occuring terms will consume > about as much time. > > (Perhaps the documentation should explain it this way rather than just > state "Mileage may vary depending on term saturation".) > > While benchmarking remember that RD might require a warm up period while II > does not. > > Feel free to report back with any findings. > > > > karl > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
