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Andrew Wang commented on HDFS-3650: ----------------------------------- I think the testcase failures are unrelated, even though there are a lot of them. TestZKFailoverController, TestTFile* (HADOOP-8537), TestNameNodeMetrics (HDFS-2434) are reported flaky. TestMetricsSystemImpl, TestReplication, TestPersistBlocks, I ran locally and passed. > Use MutableQuantiles to provide latency histograms for various operations > ------------------------------------------------------------------------- > > Key: HDFS-3650 > URL: https://issues.apache.org/jira/browse/HDFS-3650 > Project: Hadoop HDFS > Issue Type: Improvement > Affects Versions: 2.0.0-alpha > Reporter: Andrew Wang > Assignee: Andrew Wang > Attachments: hdfs-3650-1.patch > > > MutableQuantiles provide accurate estimation of various percentiles for a > stream of data. Many existing metrics reported by a MutableRate would also > benefit from having these percentiles; lets add MutableQuantiles where we > think it'd be useful. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira