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https://issues.apache.org/jira/browse/HDFS-7112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaoyu Yao updated HDFS-7112:
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Attachment: HDFS-7112.2.patch
Can't repro the build failure from Jenkins. Update the patch.
> LazyWriter should use either async IO or one thread per physical disk
> ---------------------------------------------------------------------
>
> Key: HDFS-7112
> URL: https://issues.apache.org/jira/browse/HDFS-7112
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Affects Versions: HDFS-6581
> Reporter: Arpit Agarwal
> Assignee: Xiaoyu Yao
> Fix For: 2.6.0
>
> Attachments: HDFS-7112.0.patch, HDFS-7112.1.patch, HDFS-7112.2.patch
>
>
> The LazyWriter currently uses synchronous IO and a single thread. This limits
> the throughput to that of a single disk. Using either async overlapped IO or
> one thread per physical disk will improve the write throughput.
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