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https://issues.apache.org/jira/browse/HDFS-15207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17055211#comment-17055211
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Íñigo Goiri commented on HDFS-15207:
------------------------------------
A minor style comment, let's make the Thread a lambda too:
{code}
new Thread(() -> {
...
}).start();
{code}
For the waitFor, make it 10 millis or so, 1 milli seems a little too much.
> 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
> Attachments: HDFS-15207.001.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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