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https://issues.apache.org/jira/browse/HDFS-15382?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17196824#comment-17196824
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Aiphago commented on HDFS-15382:
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This is a sample base our 2.7 version, mian logic is similar, but apply to
trunck need some wrok todo.
> Split FsDatasetImpl from blockpool lock to blockpool volume lock
> -----------------------------------------------------------------
>
> Key: HDFS-15382
> URL: https://issues.apache.org/jira/browse/HDFS-15382
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Aiphago
> Assignee: Aiphago
> Priority: Major
> Fix For: 3.2.1
>
> Attachments: HDFS-15382-sample.patch, image-2020-06-02-1.png,
> image-2020-06-03-1.png
>
>
> In HDFS-15180 we split lock to blockpool grain size.But when one volume is in
> heavy load and will block other request which in same blockpool but different
> volume.So we split lock to two leval to avoid this happend.And to improve
> datanode performance.
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