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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12461) Ozone: Ozone data placement is not even
Date Fri, 15 Sep 2017 03:16:02 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12461?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16167271#comment-16167271
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Weiwei Yang commented on HDFS-12461:
------------------------------------

Hi [~anu]

A quick check, is your data dir configured to respect disk volumes, e.g /disk1/data, /disk2/data?

> Ozone: Ozone data placement is not even
> ---------------------------------------
>
>                 Key: HDFS-12461
>                 URL: https://issues.apache.org/jira/browse/HDFS-12461
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>    Affects Versions: HDFS-7240
>            Reporter: Anu Engineer
>            Priority: Blocker
>              Labels: ozoneMerge
>
> On a machine with 3 data disks, Ozone keeps on picking the same disk to place all containers.
Looks like we have a bug in the round robin selection of disks.
> Steps to Reproduce:
> 1. Install an Ozone cluster.
> 2. Make sure that datanodes have more than one disk.
> 3. Run corona few times, each run creates more containers.
> 4. Login into the data node.
> 5. Run a command like tree or ls -R /data or independently verify each location.



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