I have an existing cluster, 43 nodes. Running RHEL 6.6, Ambari 18.104.22.168, HDP 22.214.171.124 not in HA mode. The servers are about 6 years old and we are looking to do a phased hardware refresh over a 3-year time frame.
Any suggestions on how to approach this? With the refresh I would like to upgrade to HDP 3.X and implement HA as well.