We have a stable Cassandra cluster with heavy nodes of 4TB each. What will happen when another 4TB node is added - will it start to accept requests immediately, or only when the full cluster rebalance will finally finish?
1 Answers
If you are adding nodes to a cluster following the proper steps, the new node will not accept client requests until the join/streaming operations are complete.
The only time that would happen, is if auto_bootstrap was set to false on the new node. Then, the node would join without streaming data, and attempt to service requests before the data could be successfully streamed (via repair/rebuild).
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