A Hadoop cluster admin notices frequent node failures causing job delays. Which combined action best improves reliability?

hard📝 Application Q15 of 15

Hadoop - Cluster Administration

AReduce replication factor and restart the cluster daily.

BDisable monitoring tools and rely on manual checks.

CIncrease replication factor and set up automated node monitoring alerts.

DRun all jobs on a single node to avoid network issues.

Step-by-Step Solution

Solution:

Step 1: Understand impact of replication factor
Increasing replication factor stores more copies of data, protecting against node failures.
Step 2: Importance of automated monitoring
Automated alerts help detect node issues quickly, enabling fast fixes and reducing delays.
Step 3: Evaluate other options
Reducing replication lowers reliability; disabling monitoring delays issue detection; running jobs on one node risks overload and failure.
Final Answer:
Increase replication factor and set up automated node monitoring alerts. -> Option C
Quick Check:
Replication + monitoring = better reliability [OK]

Quick Trick: More copies + alerts = fewer failures [OK]

Common Mistakes:

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