Automatic NameNode service HA

Automatic NameNode Service HA is supported in gpfs.hdfs-protocol 2.7.0-2 and later. The implementation of high availability (HA) is the same as NFS-based HA in native HDFS. The only difference is that except for the NFS shared directory in native HDFS, HA is not needed for HDFS transparency.

The prerequisite to configure automatic NameNode HA is to have zookeeper services running in the cluster.