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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10564) UNDER MIN REPL'D BLOCKS should be prioritized for replication
Date Tue, 28 Jun 2016 22:42:57 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15353819#comment-15353819

Andrew Wang commented on HDFS-10564:

Hi Elliot, I'm guessing "draining" here means decommissioning? I agree with your assessment
about prioritization.

> 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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