Shahrukh Khan created AMBARI-21731:
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Summary: Rolling Decommission of HDFS Datanodes
Key: AMBARI-21731
URL: https://issues.apache.org/jira/browse/AMBARI-21731
Project: Ambari
Issue Type: New Feature
Components: ambari-server
Affects Versions: 2.5.1
Reporter: Shahrukh Khan
Implement feature of Rolling Decommission for HDFS Datanodes.
Use "Under-Replicated Blocks" as parameter for Rolling Decommission, Instead of
Wait Time.
E.g. - To decommission 100 HDFS Datanodes - with rolling decommission of 3
nodes at a time, a batch of decommission should trigger when a threshold of -
"Minimum number of Under-Replicated Blocks" has reached.
*Note - Minimum Threshold of - "Under-Replicated Blocks" has to be taken care
so that we don't end up in a situation with huge load on HDFS Namenode and high
number of Under Replicated Blocks - Specially with Datanodes of huge Data size
( ~ TB )
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