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From "Benoy Antony (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-6363) Improve concurrency while checking inclusion and exclusion of datanodes
Date Sat, 10 May 2014 22:15:22 GMT
Benoy Antony created HDFS-6363:
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             Summary: Improve concurrency while checking inclusion and exclusion of datanodes
                 Key: HDFS-6363
                 URL: https://issues.apache.org/jira/browse/HDFS-6363
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Benoy Antony
            Assignee: Benoy Antony
         Attachments: HDFS-6363.patch

HostFileManager holds two effectively immutable objects - includes and excludes. These two
objects can be safely published together using a volatile container instead of synchronizing
for all mutators and accessors.
This improves the concurrency while using HostFileManager.




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