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https://issues.apache.org/jira/browse/HDFS-1564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13288019#comment-13288019
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Prashant Kommireddi commented on HDFS-1564:
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Wouldn't "dfs.datanode.du.pct" make sense at the node level, at least? Consider
the case when one adds new hardware to the cluster and chooses machines with a
different disk capacity compared to current hardware. Current way of using
"dfs.datanode.du.reserved" will make it hard to say, reserve 5% for non-dfs use.
> 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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