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.Next: How the Migration Works
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:
Let’s try out some of these improvements.
Learn how to perform a 'zero-downtime' migration from Cassandra 3.x to 4.x