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From Íñigo Goiri (Jira) <j...@apache.org>
Subject [jira] [Commented] (HDFS-14769) Add throttler for DataNode#DataTransfer
Date Fri, 23 Aug 2019 17:51:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-14769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16914505#comment-16914505
] 

Íñigo Goiri commented on HDFS-14769:
------------------------------------

We should avoid moving all the imports.
BTW, I think I have seen some similar JIRA.
Actually, it looks like mine: HDFS-12904

> Add throttler for DataNode#DataTransfer
> ---------------------------------------
>
>                 Key: HDFS-14769
>                 URL: https://issues.apache.org/jira/browse/HDFS-14769
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Lisheng Sun
>            Assignee: Lisheng Sun
>            Priority: Major
>         Attachments: HDFS-14769.001.patch
>
>
> When a amount of block replicas are moving, the bandwidth will be full without throtter
in DataNode#DataTransfer.
> This will affect normal reading and writing.
> {code:java}
> /**
>  * Do the deed, write the bytes
>  */
> @Override
> public void run() {
>     // send data & checksum
>     blockSender.sendBlock(out, unbufOut, null);
> }{code}



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