Performing a Rolling Upgrade on a CDH 5 Cluster
Minimum Required Role: Cluster Administrator (also provided by Full Administrator)
The rolling upgrade feature takes advantage of parcels and the HDFS high availability to enable you to upgrade your cluster software and restart the upgraded services without taking the entire cluster down. You must have HDFS high availability enabled to perform a rolling upgrade.
This page described how to perform a rolling upgrade between maintenance and minor versions of CDH 5, except Beta versions.