If you want to do a version upgrade, you need to basically do follow node by node:
0) stop repairs 1) make sure your sstables are at the latest version (nodetool upgradesstables can do it) 2) stop cassandra 3) update cassandra software and update cassandra.yaml and cassandra-env.sh files 4) start cassandra After all nodes are up, run “nodetool upgradesstables” on each node to update your sstables to the latest version. Also please note that when you upgrade, you need to upgrade only between compatible versions. E.g. 2.2.x -> 3.0.x but not 1.2 to 3.11 Cheers, Hannu On 14 December 2017 at 12:33:49, Anshu Vajpayee (anshu.vajpa...@gmail.com) wrote: Hi - Is it possible to upgrade a cluster ( DC wise) using nodetool rebuild ? -- *C*heers,* *Anshu V*
