We should add some reasonable HDFS HA guide for hadoop-2.0.0-alpha since it's a major feature.
Document HA configuration and CLI
Document new HA-related configs in hdfs-default.xml
The typo in the JIRA summary scared me - thought you meant some sort of GUID.
Hey Arun – certainly all our docs can be better, but do you have specific complaints about the one that's already there? See hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/HDFSHighAvailability.apt.vm
I wouldn't consider further improvements past that a blocker.