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https://issues.apache.org/jira/browse/HDFS-16277?focusedWorklogId=667411&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-667411
 ]

ASF GitHub Bot logged work on HDFS-16277:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 20/Oct/21 02:06
            Start Date: 20/Oct/21 02:06
    Worklog Time Spent: 10m 
      Work Description: hadoop-yetus commented on pull request #3559:
URL: https://github.com/apache/hadoop/pull/3559#issuecomment-947251645


   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   |||| _ Prechecks _ |
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   | +0 :ok: |  codespell  |   0m  0s |  |  codespell was not available.  |
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   | +1 :green_heart: |  test4tests  |   0m  0s |  |  The patch appears to 
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   |||| _ trunk Compile Tests _ |
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Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04  |
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   |||| _ Patch Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |   1m 24s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |   1m 24s |  |  the patch passed with JDK 
Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04  |
   | +1 :green_heart: |  javac  |   1m 24s |  |  the patch passed  |
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Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10  |
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[/blanks-eol.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3559/3/artifact/out/blanks-eol.txt)
 |  The patch has 2 line(s) that end in blanks. Use git apply --whitespace=fix 
<<patch_file>>. Refer https://git-scm.com/docs/git-apply  |
   | -0 :warning: |  checkstyle  |   0m 51s | 
[/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3559/3/artifact/out/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt)
 |  hadoop-hdfs-project/hadoop-hdfs: The patch generated 47 new + 230 unchanged 
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   | +1 :green_heart: |  mvnsite  |   1m 18s |  |  the patch passed  |
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   | +1 :green_heart: |  javadoc  |   1m 17s |  |  the patch passed with JDK 
Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10  |
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   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  | 362m  5s |  |  hadoop-hdfs in the patch 
passed.  |
   | +1 :green_heart: |  asflicense  |   0m 47s |  |  The patch does not 
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   |  |   | 485m 44s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3559/3/artifact/out/Dockerfile
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   | GITHUB PR | https://github.com/apache/hadoop/pull/3559 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall 
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   | uname | Linux fb8930207713 4.15.0-153-generic #160-Ubuntu SMP Thu Jul 29 
06:54:29 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux |
   | Build tool | maven |
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   | git revision | trunk / 6ec0b22306fb2a8bcdf5d75ca086243c38c2261f |
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/usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10 |
   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3559/3/testReport/ |
   | Max. process+thread count | 1875 (vs. ulimit of 5500) |
   | modules | C: hadoop-hdfs-project/hadoop-hdfs U: 
hadoop-hdfs-project/hadoop-hdfs |
   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3559/3/console |
   | versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
   | 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: 667411)
    Time Spent: 1h  (was: 50m)

> improve decision in AvailableSpaceBlockPlacementPolicy
> ------------------------------------------------------
>
>                 Key: HDFS-16277
>                 URL: https://issues.apache.org/jira/browse/HDFS-16277
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: block placement
>    Affects Versions: 3.3.1
>            Reporter: guo
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> Hi 
> In product environment,we may meet two or more datanode usage reaches nealy 
> 100%,for exampe 99.99%,98%,97%.
> if we configure `AvailableSpaceBlockPlacementPolicy` , we also have the 
> chance to choose the 99.99%(assume it is the highest usage),for we treat the 
> two choosen datanode as the same usage if their storage usage are different 
> within 5%.
> but this is not what we want, so i suggest we can improve the decision.



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