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https://issues.apache.org/jira/browse/HDFS-15879?focusedWorklogId=570156&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-570156
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ASF GitHub Bot logged work on HDFS-15879:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 23/Mar/21 00:17
            Start Date: 23/Mar/21 00:17
    Worklog Time Spent: 10m 
      Work Description: hadoop-yetus commented on pull request #2748:
URL: https://github.com/apache/hadoop/pull/2748#issuecomment-804487762


   :broken_heart: **-1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
   | +0 :ok: |  reexec  |   0m  0s |  |  Docker mode activated.  |
   | -1 :x: |  patch  |   0m 17s |  |  
https://github.com/apache/hadoop/pull/2748 does not apply to trunk. Rebase 
required? Wrong Branch? See 
https://cwiki.apache.org/confluence/display/HADOOP/How+To+Contribute for help.  
|
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | GITHUB PR | https://github.com/apache/hadoop/pull/2748 |
   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2748/6/console |
   | versions | git=2.17.1 |
   | Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 570156)
    Time Spent: 2h  (was: 1h 50m)

> Exclude slow nodes when choose targets for blocks
> -------------------------------------------------
>
>                 Key: HDFS-15879
>                 URL: https://issues.apache.org/jira/browse/HDFS-15879
>             Project: Hadoop HDFS
>          Issue Type: Wish
>            Reporter: tomscut
>            Assignee: tomscut
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 2h
>  Remaining Estimate: 0h
>
> Previously, we have monitored the slow nodes, related to 
> [HDFS-11194|https://issues.apache.org/jira/browse/HDFS-11194].
> We can use a thread to periodically collect these slow nodes into a set. Then 
> use the set to filter out slow nodes when choose targets for blocks.
> This feature can be configured to be turned on when needed.



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