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https://issues.apache.org/jira/browse/HADOOP-10410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13940113#comment-13940113
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Liang Xie commented on HADOOP-10410:
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One think i don't like tuning scheduler in HBase/HDFS scenario, is it's not
flexiable enough, this setting will influence the whole block device. And take
HBase/HDFS for example, what we need is controling the io priority per thread
or client or other granularities. I knew deadline was recommended in RDBMS
area, especially MySQL env, but so far, i never heart any guys used it in
HADOOP production env:)
> Support ioprio_set in NativeIO
> ------------------------------
>
> Key: HADOOP-10410
> URL: https://issues.apache.org/jira/browse/HADOOP-10410
> Project: Hadoop Common
> Issue Type: New Feature
> Components: native
> Affects Versions: 3.0.0, 2.4.0
> Reporter: Liang Xie
> Assignee: Liang Xie
>
> It would be better to HBase application if HDFS layer provide a fine-grained
> IO request priority. Most of modern kernel should support ioprio_set system
> call now.
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