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https://issues.apache.org/jira/browse/HDFS-15180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17055747#comment-17055747
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zhuqi commented on HDFS-15180:
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CC [~sodonnell]
And my version is based cdh 5.16.1, and my lock is fair lock. What is the key
performance factor about the RW in DataNode you want to know, i can try to
confirm the RW improvement when i next to gray more nodes in our busy cluster.
May be we need more metrics to help the performance improvement confirm, what
do you think about it?
Thanks a lot.
> 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: zhuqi
> Priority: Major
> Attachments: 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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