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You want to automate alerting when HDFS disk usage exceeds 80% using Ambari. Which approach is best?

hard📝 Best Practice Q15 of 15
Hadoop - Cluster Administration
You want to automate alerting when HDFS disk usage exceeds 80% using Ambari. Which approach is best?
AWrite a MapReduce job to scan disk usage
BManually check disk usage daily via Ambari UI
CConfigure Ambari Alerts to monitor HDFS disk usage and send notifications
DRestart NameNode when disk usage is high
Step-by-Step Solution
Solution:

  1. Step 1: Identify automation capabilities in Ambari

    Ambari supports alert definitions that monitor metrics and trigger notifications automatically.

  2. Step 2: Evaluate options for disk usage alerting

    Configuring alerts is the best automated method; manual checks or MapReduce jobs are inefficient or unrelated.

  3. Final Answer:

    Configure Ambari Alerts to monitor HDFS disk usage and send notifications -> Option C

  4. Quick Check:

    Use Ambari Alerts for automation [OK]
Quick Trick: Use built-in Ambari Alerts for automatic monitoring [OK]
Common Mistakes:
  • Relying on manual checks
  • Using MapReduce for monitoring
  • Restarting services without cause

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