The HDFS NameNode is a robust and reliable service as seen in practice in production at Yahoo, Facebook and other enterprises. However, the NameNode does not have automatic failover. A hot failover solution called HA NameNode is under active development (HDFS-1623) and making excellent progress. Join Hortonworks founder Sanjay Radia, as he outlines the approach and current status. Sanjay is an Apache Hadoop Committer and original architect of the Hadoop HDFS project at Yahoo!