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https://issues.apache.org/jira/browse/HDFS-15207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17110393#comment-17110393
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Hudson commented on HDFS-15207:
-------------------------------

FAILURE: Integrated in Jenkins build Hadoop-trunk-Commit #18269 (See 
[https://builds.apache.org/job/Hadoop-trunk-Commit/18269/])
HDFS-15207. VolumeScanner skip to scan blocks accessed during recent (weichiu: 
rev 50caba1a92cb36ce78307d47ed7624ce216562fc)
* (edit) 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
* (edit) 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockScanner.java
* (edit) 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/VolumeScanner.java
* (edit) 
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestBlockScanner.java


> VolumeScanner skip to scan blocks accessed during recent scan peroid
> --------------------------------------------------------------------
>
>                 Key: HDFS-15207
>                 URL: https://issues.apache.org/jira/browse/HDFS-15207
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>            Reporter: Yang Yun
>            Assignee: Yang Yun
>            Priority: Minor
>             Fix For: 3.3.1, 3.4.0
>
>         Attachments: HDFS-15207.002.patch, HDFS-15207.003.patch, 
> HDFS-15207.004.patch, HDFS-15207.005.patch, HDFS-15207.006.patch, 
> HDFS-15207.007.patch, HDFS-15207.008.patch, HDFS-15207.patch, HDFS-15207.patch
>
>
> Check the access time of block file to avoid scanning recently changed 
> blocks, reducing disk IO.



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