https://community.cloudera.com/t5/Support-Questions/Is-there-any-best-practice-or-guide-to-perform-hardware-RAM/m-p/184825#M146932 <P>If you want to minimize your down time you can try to stop nodes one by one, upgrade RAM and restart all components on the node after restart. You must do masters one by one, but in case of workers you can do in sets of 2, or if you have rack-awarness in sets of 3-4 or even rack by rack. You need HA configuration of major services like HDFS, Yarn, HBase, Hive for this to work. You also need replication of Kafka topics of at least 2, and do Kafka nodes one by one, if you have Kafka.</P> Fri, 07 Apr 2017 05:15:27 GMT pminovic 2017-04-07T05:15:27Z https://community.cloudera.com/t5/Support-Questions/Is-there-any-best-practice-or-guide-to-perform-hardware-RAM/m-p/184823#M146930 Mon, 03 Apr 2017 15:53:54 GMT https://community.cloudera.com/t5/Support-Questions/Is-there-any-best-practice-or-guide-to-perform-hardware-RAM/m-p/184823#M146930 bhavintandel 2017-04-03T15:53:54Z https://community.cloudera.com/t5/Support-Questions/Is-there-any-best-practice-or-guide-to-perform-hardware-RAM/m-p/184824#M146931 <P>While we do not provide a best practice to this I suggest the following: 1. Bring down the entire cluster cleanly and perform the RAM upgrade.</P><P>2. Use this to determine what all your new config settings should be:</P><P> <A href="http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.6.0/bk_command-line-installation/content/determine-hdp-memory-config.html" target="_blank">http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.6.0/bk_command-line-installation/content/determine-hdp-memory-config.html</A> (or use the correct one for your HDP release, this is from 2.6.0)</P><P>3. Once you change your memory settings, restart the cluster.</P> Fri, 07 Apr 2017 02:10:12 GMT https://community.cloudera.com/t5/Support-Questions/Is-there-any-best-practice-or-guide-to-perform-hardware-RAM/m-p/184824#M146931 orlandoteixeira 2017-04-07T02:10:12Z https://community.cloudera.com/t5/Support-Questions/Is-there-any-best-practice-or-guide-to-perform-hardware-RAM/m-p/184825#M146932 <P>If you want to minimize your down time you can try to stop nodes one by one, upgrade RAM and restart all components on the node after restart. You must do masters one by one, but in case of workers you can do in sets of 2, or if you have rack-awarness in sets of 3-4 or even rack by rack. You need HA configuration of major services like HDFS, Yarn, HBase, Hive for this to work. You also need replication of Kafka topics of at least 2, and do Kafka nodes one by one, if you have Kafka.</P> Fri, 07 Apr 2017 05:15:27 GMT https://community.cloudera.com/t5/Support-Questions/Is-there-any-best-practice-or-guide-to-perform-hardware-RAM/m-p/184825#M146932 pminovic 2017-04-07T05:15:27Z