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https://issues.apache.org/jira/browse/HDFS-1564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13138233#comment-13138233
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Harsh J commented on HDFS-1564:
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Rita,
The percentage opt was removed. It isn't valid anymore. But it used to apply
per volume, and it will be if reintroduced as well.
The remaining action of discussion here is to decide if we should go with:
* Percentage opt, one value across all disks.
* Byte opt, one value per disk.
Or leave it as is, where one byte opt applies across all disks.
> Make dfs.datanode.du.reserved configurable per volume
> -----------------------------------------------------
>
> Key: HDFS-1564
> URL: https://issues.apache.org/jira/browse/HDFS-1564
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: data-node
> Reporter: Aaron T. Myers
> Priority: Minor
>
> In clusters with DNs which have heterogeneous data dir volumes, it would be
> nice if dfs.datanode.du.reserved could be configured per-volume.
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