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From "Tao Jie (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-15194) Some properties for FairCallQueue should be reloadable
Date Fri, 26 Jan 2018 08:33:00 GMT
Tao Jie created HADOOP-15194:
--------------------------------

             Summary: Some properties for FairCallQueue should be reloadable
                 Key: HADOOP-15194
                 URL: https://issues.apache.org/jira/browse/HADOOP-15194
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: Tao Jie


When trying to make use of FairCallQueue for a large cluster, it is not easy to set the properties
appropriately at the first time. User may adjust those properties frequently and restarting
the namenode costs a lot for a large multi-user hadoop clluster. We should support to reload
some of those properties in configuration without restarting.
Related properties:
ipc.8020.faircallqueue.multiplexer.weights
ipc.8020.faircallqueue.decay-scheduler.thresholds
ipc.8020.decay-scheduler.backoff.responsetime.thresholds




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