My cluster 5 nodes ，Can I stop 2 nodes?
What is your replication factor? If it’s 3, you can stop 2 nodes and still tolerate a failure. If it’s 5, your cluster would become unavailable if one more node went down.
You can find your replication factor by viewing your replication zones and checking for
num_replicas. See the docs on replication zones for more details.
thank you, The answer has been found in the documentation.