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https://issues.apache.org/jira/browse/HDFS-6988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14138141#comment-14138141
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Colin Patrick McCabe commented on HDFS-6988:
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Hi Arpit,
I looked at the patch for HDFS-6991, and it seems to be still using a
percentage-based scheme. I don't think a percentage-based scheme makes sense,
since the amount of free space you want to keep around doesn't increase as the
size of your ramdisk goes up. Does that makes sense?
> Make RAM disk eviction thresholds configurable
> ----------------------------------------------
>
> Key: HDFS-6988
> URL: https://issues.apache.org/jira/browse/HDFS-6988
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Affects Versions: HDFS-6581
> Reporter: Arpit Agarwal
> Assignee: Arpit Agarwal
> Fix For: HDFS-6581
>
>
> Per feedback from [~cmccabe] on HDFS-6930, we can make the eviction
> thresholds configurable. The hard-coded thresholds may not be appropriate for
> very large RAM disks.
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