[ https://issues.apache.org/jira/browse/HDFS-12277?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael Han updated HDFS-12277: ------------------------------- Status: Patch Available (was: Open) > NNThroughputBenchmark should use cumulativeTime to calculate ops per second. > ---------------------------------------------------------------------------- > > Key: HDFS-12277 > URL: https://issues.apache.org/jira/browse/HDFS-12277 > Project: Hadoop HDFS > Issue Type: Bug > Components: benchmarks, tools > Reporter: Michael Han > Assignee: Michael Han > Priority: Minor > Attachments: HDFS-12277.000.patch > > > {{NNThroughputBenchmark$getOpsPerSecond}} is using {{elapsedTime}} to > calculate ops per second. {{elapsedTime}} is the time used to measure the > time from the start to the finish of the benchmark main thread, and it's also > the total execution time of the single slowest benchmark worker thread. To > measure ops per second, we should use the total execution time of all worker > threads, which is {{cumulativeTime}}. Otherwise, we could get bogus result, > e.g. given same load, the more client threads we have (controlled by > {{-threads}}), the larger ops per second the number would be, with the same > NN and its server side configurations. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org