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https://issues.apache.org/jira/browse/HDFS-7090?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaoyu Yao reassigned HDFS-7090:
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Assignee: Xiaoyu Yao
> Use unbuffered writes when persisting in-memory replicas
> --------------------------------------------------------
>
> Key: HDFS-7090
> URL: https://issues.apache.org/jira/browse/HDFS-7090
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Affects Versions: HDFS-6581
> Reporter: Arpit Agarwal
> Assignee: Xiaoyu Yao
>
> The LazyWriter thread just uses {{FileUtils.copyFile}} to copy block files to
> persistent storage. It would be better to use unbuffered writes to avoid
> churning page cache.
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