Ravikumar created HDFS-11540:
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Summary: PeerCache sync overhead
Key: HDFS-11540
URL: https://issues.apache.org/jira/browse/HDFS-11540
Project: Hadoop HDFS
Issue Type: Improvement
Components: hdfs-client
Affects Versions: 2.7.1
Reporter: Ravikumar
Priority: Minor
PeerCache has a fair amount sync over-head. In addition to class level locking,
expired sockets & eldest socket are closed in critical section during gets &
puts respectively..
A ConcurrentLinkedHashMap with appropriate fencing using DatanodeID could speed
it up?
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