Magic Collaboration Studio no longer supports Apache Cassandra 3.x, therefore before upgrading Magic Collaboration Studio, you need to upgrade Cassandra to version 4.x (we recommend using Cassandra 4.0.3).
Make sure that all the nodes are ready.
Create a snapshot of your data for backup.
Upgrade sstables by running the command nodetool upgradesstables on each node.
To upgrade Cassandra
IMPORTANT!Flush memtables to the disk by executing the following command: