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https://issues.apache.org/jira/browse/HDFS-1564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13138226#comment-13138226
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Rita M commented on HDFS-1564:
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Interesting topic. I too have the same issue.
Harsh, when setting the pct it seems hdfs still gobbles up more than the
reserved data. I suspect its taking the entire data node and then reserving 1%
not by volume wise.
> 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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