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https://issues.apache.org/jira/browse/HDFS-17387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17821129#comment-17821129
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ASF GitHub Bot commented on HDFS-17387:
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ferhui commented on code in PR #6572:
URL: https://github.com/apache/hadoop/pull/6572#discussion_r1503944791
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hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/fgl/MeasurableReentrantReadWriteLock.java:
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Review Comment:
Is it used for tracking performance? seems unrelated to make the locking
mode configurable.
> [FGL] Abstract the configurable locking mode
> --------------------------------------------
>
> Key: HDFS-17387
> URL: https://issues.apache.org/jira/browse/HDFS-17387
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: ZanderXu
> Assignee: ZanderXu
> Priority: Major
> Labels: pull-request-available
>
> Abstract a lock mode to cover the current global lock and the new
> fine-grained lock(global FS lock and global BM lock).
> End-user can select to use lock mode through configuration.
> The possible lock modes after this patch are as follows:
> * GLOBAL Lock
> * FS Lock
> * BM Lock
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