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https://issues.apache.org/jira/browse/HDFS-15180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17064192#comment-17064192
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Aiphago commented on HDFS-15180:
--------------------------------
Fix the problem in UT
> DataNode FsDatasetImpl Fine-Grained Locking via BlockPool.
> -----------------------------------------------------------
>
> Key: HDFS-15180
> URL: https://issues.apache.org/jira/browse/HDFS-15180
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 3.2.0
> Reporter: zhuqi
> Assignee: Aiphago
> Priority: Major
> Attachments: HDFS-15180.001.patch, HDFS-15180.002.patch,
> HDFS-15180.003.patch, HDFS-15180.004.patch,
> image-2020-03-10-17-22-57-391.png, image-2020-03-10-17-31-58-830.png,
> image-2020-03-10-17-34-26-368.png
>
>
> Now the FsDatasetImpl datasetLock is heavy, when their are many namespaces in
> big cluster. If we can split the FsDatasetImpl datasetLock via blockpool.
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