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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-10319) Balancer should not try to pair storages with different types
Date Thu, 21 Apr 2016 22:39:12 GMT

     [ https://issues.apache.org/jira/browse/HDFS-10319?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo Nicholas Sze updated HDFS-10319:
---------------------------------------
       Resolution: Fixed
    Fix Version/s: 2.7.3
           Status: Resolved  (was: Patch Available)

Thanks Chris for reviewing the patch.

I have committed this.

> 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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