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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-14734) [FGL] Introduce Latch Lock to replace Namesystem global lock.
Date Wed, 14 Aug 2019 22:38:00 GMT
Konstantin Shvachko created HDFS-14734:
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             Summary: [FGL] Introduce Latch Lock to replace Namesystem global lock.
                 Key: HDFS-14734
                 URL: https://issues.apache.org/jira/browse/HDFS-14734
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: namenode
            Reporter: Konstantin Shvachko


The concept of Latch Lock associates a separate lock with each partition of PartitionedGSet.
Define the order of acquiring locks on the partitions. Some operations will require holding
locks on multiple partitions.
It is preferable to retain the global lock for some operations, such as rename.




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