Hi all. Recently we made a change to our production env c* cluster (2.1.18) - placing the commit log to the same SSD where data is stored, which needs restarting all nodes.
Before restarting a cassandra node, we ran the following nodetool utils: $ nodetool disablethrift && sleep 5 $ nodetool disablebinary && sleep 5 $ nodetool disable gossip && sleep 5 $ nodetool drain && sleep 5 It was "graceful" as expected (no significant errors found), but the process is still a myth to us: are those commands used above "sufficient", and/or why? The offical doc (docs.datastax.com) did not help with this operation detail, though "nodetool drain" is apparently essential.
