What is the Difference between node unresponsive and node failover in Couchbase while I was monitoring my cluster I can see one node is in unresponsive state what is the exact difference between both
1 Answers
An "unresponsive" node is one that is not responding to requests. A node could be unresponsive because of a network or hardware problem, or an internal server error.
Failover is what you do to an unresponsive node to forcibly remove it from the cluster.
Further reading:
- Remove a node and rebalance (a graceful way to remove a node that IS reponsive)
- Fail a Node Over and Rebalance (a less graceful way that works with unresponsive nodes and can potentially result in loss of data that hasn't yet been replicated from the failed node)
- Recovery (after you fail over a node, if it starts behaving again you can add it back into the cluster)
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