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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10319) Balancer should not try to pair storages with different types
Date Thu, 21 Apr 2016 22:59:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10319?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15252960#comment-15252960
] 

Hudson commented on HDFS-10319:
-------------------------------

FAILURE: Integrated in Hadoop-trunk-Commit #9650 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/9650/])
HDFS-10319. Balancer should not try to pair storages with different (szetszwo: rev bbce1d525e0016c9b8e573b86af3c87aa39582bd)
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java


> Balancer should not try to pair storages with different types
> -------------------------------------------------------------
>
>                 Key: HDFS-10319
>                 URL: https://issues.apache.org/jira/browse/HDFS-10319
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: balancer & mover
>            Reporter: Tsz Wo Nicholas Sze
>            Assignee: Tsz Wo Nicholas Sze
>            Priority: Minor
>             Fix For: 2.7.3
>
>         Attachments: h10319_20160420.patch
>
>
> This is a performance bug – Balancer may pair a source datanode and a target datanode
with different storage types. Fortunately, it will fail schedule any blocks in such pair since
it will find out that the storage types are not matched later on.
> The bug won't lead to incorrect results.



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