Ambari Properties backup
You must make a safe copy of the Ambari Server configuration file found at /etc/ambari-server/conf/ambari.properties.
During the Ambari upgrade, the existing
ambari-env.sh file is
overwritten and a backup copy of
ambari-env.sh (with extension
.rpmsave) is created. If you have manually modified
ambari-env.sh (for example, to change Ambari Server heap), you must
reapply your changes in the new file.
To purge your Ambari cluster, see Purging Ambari Server Database History.