開源搜尋引擎：Nutch , Hadoop , Lucene , Solr

http://blog.csdn.net/chaofanwei/article/details/12523675

http://abloz.com/2012/07/03/nutch-and-solr-search-enging.html

http://www.cnblogs.com/gumpeng/archive/2013/05/06/3063159.html