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https://issues.apache.org/jira/browse/HDFS-12461?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16167272#comment-16167272
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Anu Engineer commented on HDFS-12461:
-------------------------------------
it is mapped like this.
{noformat}
<property>
<name>dfs.datanode.data.dir</name>
<value>/data/disk1/dfs/data,/data/disk2/dfs/data,/data/disk3/dfs/data</value>
<final>true</final>
</property>
{noformat}
> 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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