Hadoop - Cluster Administration
Why does Cloudera Manager use both active and passive monitoring methods for Hadoop services?
Why does Cloudera Manager use both active and passive monitoring methods for Hadoop services?
hard📝 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Understand active vs passive monitoring
Active monitoring queries services directly; passive collects data from logs or agents.Step 2: Reason why both are used
Combining both provides timely alerts and reduces load on cluster resources.Step 3: Eliminate incorrect options
Passive is not always faster, monitoring all nodes is needed, active monitoring is not limited to YARN.Final Answer:
To balance real-time alerts with resource usage efficiency -> Option DQuick Check:
Active + passive = balance alerts and efficiency [OK]
Quick Trick: Use both monitoring types for balance and efficiency [OK]
Common Mistakes:
- Thinking passive is always faster
- Assuming monitoring excludes some services
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