http://www.cnblogs.com/fangjian0423/p/logstash-elasticsearch-build.html
http://chenlinux.com/2013/07/11/howto-filter-count-in-logstash/
http://www.cnblogs.com/fangjian0423/p/logstash-elasticsearch-build.html
http://chenlinux.com/2013/07/11/howto-filter-count-in-logstash/