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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