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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9551) Random VolumeChoosingPolicy
Date Wed, 16 Dec 2015 04:37:46 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9551?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15059488#comment-15059488
] 

Andrew Wang commented on HDFS-9551:
-----------------------------------

Does it show up on a real cluster? Could you post your test code and benchmark results?

> Random VolumeChoosingPolicy
> ---------------------------
>
>                 Key: HDFS-9551
>                 URL: https://issues.apache.org/jira/browse/HDFS-9551
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>    Affects Versions: 2.7.1
>            Reporter: BELUGA BEHR
>            Priority: Minor
>         Attachments: RandomVolumeChoosingPolicy.java, TestRandomVolumeChoosingPolicy.java
>
>
> Please find attached a new implementation of VolumeChoosingPolicy.  This implementation
chooses volumes at random to place blocks.  It is thread-safe and un-synchronized so there
is less thread contention.



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