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Posted to hdfs-dev@hadoop.apache.org by "Elliott Clark (JIRA)" <ji...@apache.org> on 2016/06/22 19:32:16 UTC

[jira] [Created] (HDFS-10564) UNDER MIN REPL'D BLOCKS should be prioritized for replication

Elliott Clark created HDFS-10564:
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             Summary: UNDER MIN REPL'D BLOCKS should be prioritized for replication
                 Key: HDFS-10564
                 URL: https://issues.apache.org/jira/browse/HDFS-10564
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Elliott Clark


When datanodes get drained they are probably being drained because the hardware is bad, or suspect. The blocks that have no live nodes should be prioritized. However it appears not to be the case at all.

Draining full nodes with lots of blocks but only a handful of under min replicated blocks takes about the full time before fsck reports clean again.



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