It is also worth noting that Namenode isn't a spof in Hadoop 2. Namenode HA[1] has been in for a while and QJM[1] went in more recently. [1] https://ccp.cloud

It is also worth noting that Namenode isn't a spof in Hadoop 2. Namenode HA[1] has been in for a while and QJM[1] went in more recently. [1] https://ccp.cloudera.com/display/CDH4DOC/Software+Configuration+for+Shared+Storage+Using+NFS https://ccp.cloudera.com/display/CDH4DOC/Software+Configurat... [2] http://blog.cloudera.com/blog/2012/10/quorum-based-journaling-in-cdh4-1/ http://blog.cloudera.com/blog/2012/10/quorum-based-journalin...