Which metric is crucial for assessing the health of a DataNode in a Hadoop cluster?
- CPU Temperature
- Disk Usage
- Heartbeat Status
- Network Latency
The heartbeat status is crucial for assessing the health of a DataNode in a Hadoop cluster. DataNodes send periodic heartbeats to the NameNode to confirm their availability. If the NameNode stops receiving heartbeats from a DataNode, it may be an indication of a node failure or network issues.
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