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Todd Lipcon commented on HDFS-1148: ----------------------------------- YCSB output (same test setup as described in HDFS-941). This test is run with the HDFS-941 improvements plus FSDataset being converted to a readwrite lock. [OVERALL],RunTime(ms), 94325 [OVERALL],Throughput(ops/sec), 10601.643254704479 [READ], Operations, 1000000 [READ], AverageLatency(ms), 3.747273 [READ], MinLatency(ms), 0 [READ], MaxLatency(ms), 1360 [READ], 95thPercentileLatency(ms), 10 [READ], 99thPercentileLatency(ms), 15 [READ], Return=0, 1000000 > Convert FSDataset to ReadWriteLock > ---------------------------------- > > Key: HDFS-1148 > URL: https://issues.apache.org/jira/browse/HDFS-1148 > Project: Hadoop HDFS > Issue Type: Improvement > Components: data-node > Reporter: Todd Lipcon > Assignee: Todd Lipcon > > In benchmarking HDFS-941 I noticed that for the random read workload, the > FSDataset lock is highly contended. After converting it to a > ReentrantReadWriteLock, I saw a ~25% improvement on both latency and > ops/second. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.