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# Cluster Upgrades

Nodes in a cluster can be upgraded independently of other nodes in the cluster. These upgrades include:

- Product versions

- Operating system versions

All nodes in a cluster can be at different product versions. Different product versions are detected when a node joins a cluster and any required protocol negotiation is done automatically at that time. This allows product versions to be upgraded on each node independently.

All nodes in a cluster can use different operating system versions. This allows operating system version upgrades to be done on each node independently.