This can save you lot of time http://docs.hortonworks.com/HDPDocuments/Ambari-2.2.0.0/bk_Installing_HDP_AMB/content/_set_up_password-less_ssh.html you can set up the ssh keys between ambari server and new nodes or You can use this in case you dont want to setup ssh keys http://docs.hortonworks.com/HDPDocuments/Ambari-2.1.0.0/bk_ambari_reference_guide/content/_install_the_ambari_agents_manually.html Its for 2.1.0 and same for 2.2.0 ... View more

@Olivia Shen See this thread https://community.hortonworks.com/questions/14795/why-after-submitting-a-pig-job-does-it-fail-to-sta.html ... View more

@sanjeevan mahajan Remove users https://community.hortonworks.com/questions/2904/how-do-i-remove-ldap-accounts-from-ambari.html ... View more

@sanjeevan mahajan http://docs.hortonworks.com/HDPDocuments/Ambari-2.2.0.0/bk_Ambari_Security_Guide/content/_specific_set_of_users_and_groups.html ... View more

@sanjeevan mahajan Please read the doc link that I shared. ... View more

Complete ref guide ... View more

@Shivaji You can define multiple queues. I know , its a lot to read http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.3.4/bk_performance_tuning/content/hive_perf_best_pract_better_wkld_mgmt_thru_queues.html You have to define the queue in your code or connection. ... View more