[Solved] Given the following exclude file content:node1.example.com node3.example.comand the cluster nodes are node1, node2, node3, node4.... | Hadoop

Hadoop - Cluster Administration

Given the following exclude file content:

node1.example.com
node3.example.com

and the cluster nodes are node1, node2, node3, node4.
After running hdfs dfsadmin -refreshNodes, which nodes will be decommissioned?

AAll nodes

Bnode2 and node4

Cnode1, node2, node3

Dnode1 and node3

Step-by-Step Solution

Solution:

Step 1: Understand exclude file role
The exclude file lists nodes to be decommissioned.
Step 2: Identify nodes in exclude file
Nodes node1.example.com and node3.example.com are listed, so these two will be decommissioned.
Final Answer:
node1 and node3 -> Option D
Quick Check:
Exclude file nodes = decommissioned nodes [OK]

Quick Trick: Exclude file lists nodes to decommission [OK]

Common Mistakes:

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