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  1. Ambari
  2. AMBARI-21731

Rolling Decommission of HDFS Datanodes

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      Description

      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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            • Assignee:
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              Reporter:
              shahrukhkhan489 Shahrukh Khan
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