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From "Chang Li (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-8716) introduce a new config specifically for safe mode block count
Date Mon, 06 Jul 2015 20:12:04 GMT
Chang Li created HDFS-8716:
------------------------------

             Summary: introduce a new config specifically for safe mode block count
                 Key: HDFS-8716
                 URL: https://issues.apache.org/jira/browse/HDFS-8716
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Chang Li
            Assignee: Chang Li


During the start up, namenode waits for n replicas of each block to be reported by datanodes
before exiting the safe mode. Currently n is tied to the min replicas config. We could set
min replicas to more than one but we might want to exit safe mode as soon as each block has
one replica reported. This can be worked out by introducing a new config variable for safe
mode block count



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