I've set up a two node cluster using Ambari with HBase installed. I know that we can't achieve Namenode HA without three nodes. But can we make HBase high available with two nodes, by just adding a Standby HBase Master. Does Hbase high availability depend on Namenode high availability?
Yes, you can make HBase HA with just two Hbase Masters. However, Hbase will go down if your single Namenode goes down since Hbase depends on HDFS to work.