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David Mollitor commented on HDFS-14863: --------------------------------------- Also, since this code only does READ operations, it should see a nice performance boost since any threads using this code will not block each other any more. > Remove Synchronization From BlockPlacementPolicyDefault > ------------------------------------------------------- > > Key: HDFS-14863 > URL: https://issues.apache.org/jira/browse/HDFS-14863 > Project: Hadoop HDFS > Issue Type: Improvement > Components: block placement > Affects Versions: 3.2.0 > Reporter: David Mollitor > Assignee: David Mollitor > Priority: Major > Attachments: HDFS-14863.1.patch > > > https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockPlacementPolicyDefault.java#L1010 > The {{clusterMap}} has its own internal synchronization. Also, these are > only read operations so any changes applied to the {{clusterMap}} from > another thread will be applied since no other thread synchronizes on the > {{clusterMap}} itself (that I could find). -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org