namenode ha

http://blog.csdn.net/totxian/article/details/45248399

http://www.aboutyun.com/thread-13679-1-1.html

http://www.aboutyun.com/thread-11909-1-1.html

http://www.cnblogs.com/Richardzhu/p/3435989.html

http://blog.csdn.net/liuj2511981/article/details/8678333

http://www.infoq.com/cn/articles/hadoop-2-0-namenode-ha-federation-practice-zh

http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-hdfs/HDFSCommands.html#secondarynamenode

http://www.highlyscalablesystems.com/3597/hadoop-installation-tutorial-hadoop-2-x/#format-a-new-distributed-filesystem

https://support.pivotal.io/hc/en-us/articles/201623873-HDFS-Data-Layout

http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.html

 http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-common/ClusterSetup.html#Hadoop_Startup

 http://www.cnblogs.com/ggjucheng/archive/2012/04/18/2454692.html

 http://wiki.apache.org/hadoop/FAQ#I_have_a_new_node_I_want_to_add_to_a_running_Hadoop_cluster.3B_how_do_I_start_services_on_just_one_node.3F

http://blog.csdn.net/cuishi0/article/details/6825480

http://f.dataguru.cn/thread-254109-1-1.html

http://blog.csdn.net/u014393917/article/details/25913363

http://debugo.com/namenode-ha/