Time to Complete
This scenario is about migrating (upgrading) an existing Cassandra 3.x to Cassandra 4.x. Migration will be done on a node-by-node basis so that there will always be some nodes available to service client requests.Next: Preparing for Migration
It is important to verify that all the nodes are ready before beginning a migration.
Upgrade one node at a time to allow clients to access the cluster during the process.
Resume normal operations after upgrading all nodes.
Cassandra 4.x nodes can read Cassandra 3.x SSTable files so there is no need to upgrade the data files directly. The migration process is:
Test the upgrade in a non-production environment first
Let’s try out some of these improvements.
Learn how to perform a 'zero-downtime' migration from Cassandra 3.x to 4.x
Learn more about Migrating to Cassandra 4.x