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Posted to hdfs-dev@hadoop.apache.org by "farmmamba (Jira)" <ji...@apache.org> on 2024/01/07 16:24:00 UTC

[jira] [Created] (HDFS-17330) CachingGetSpaceUsed#used should use LongAdder after DN splits lock

farmmamba created HDFS-17330:
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             Summary: CachingGetSpaceUsed#used should use LongAdder after DN splits lock
                 Key: HDFS-17330
                 URL: https://issues.apache.org/jira/browse/HDFS-17330
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: datanode
    Affects Versions: 3.3.6
            Reporter: farmmamba
            Assignee: farmmamba


After HDFS-15382, dn uses fine-grained lock.

So we should better use LongAdder instead of AtomicLong in class CachingGetSpaceUsed.



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