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https://issues.apache.org/jira/browse/HDFS-7112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14161257#comment-14161257
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Hadoop QA commented on HDFS-7112:
---------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12673243/HDFS-7112.1.patch
against trunk revision 519e5a7.
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 2 new
or modified test files.
{color:red}-1 javac{color:red}. The patch appears to cause the build to
fail.
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/8338//console
This message is automatically generated.
> 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
>
>
> 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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