http://www.infoq.com/cn/articles/java-profiling-with-open-source
http://www.infoq.com/cn/articles/Visualizing-Java-Garbage-Collection
http://www.infoq.com/cn/news/2014/01/apache-afka-messaging-system
http://www.infoq.com/cn/articles/review-the-logstash-book