Hadoop - Cluster Administration
During scaling down, you decommission multiple nodes simultaneously. What must you monitor to ensure cluster health?
During scaling down, you decommission multiple nodes simultaneously. What must you monitor to ensure cluster health?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Identify key metrics during node decommissioning
Replication status ensures data is safely copied; storage capacity ensures cluster can hold data.Step 2: Focus on cluster health indicators
Monitoring replication and storage helps avoid data loss and capacity issues during scaling down.Final Answer:
Replication status and cluster storage capacity -> Option AQuick Check:
Monitor replication and storage during decommissioning [OK]
Quick Trick: Watch replication and storage when scaling down [OK]
Common Mistakes:
- Monitoring CPU on decommissioned nodes
- Ignoring replication status
- Focusing only on network bandwidth
Master "Cluster Administration" in Hadoop
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