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What do cluster environments use to identify node failures?
Correct Answer: B
What Happens when a Node Times Out Each node sends a heartbeat message to the cluster coordinator every HEARTBEAT_INTERVAL number of microseconds (as specified in the cluster configuration file). The cluster coordinator looks for this message from each node, and if it does not receive it within NODE_TIMEOUT microseconds, the cluster is reformed minus the node no longer sending heartbeat messages. On a node that is not the cluster coordinator, and on which a node timeout occurs (that is, no heartbeat message has arrived within NODE_TIMEOUT seconds), the following sequence of events occurs: References: http://docstore.mik.ua/manuals/hp-ux/en/B3936-90122/ch03s07.html