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From "Xiaoyu Yao (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HDFS-7112) LazyWriter should use either async IO or one thread per physical disk
Date Tue, 30 Sep 2014 20:27:34 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xiaoyu Yao reassigned HDFS-7112:
--------------------------------

    Assignee: Xiaoyu Yao

> 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
>
> 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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