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Siqi Li commented on MAPREDUCE-5873: ------------------------------------ I see, thanks Sangjin > Measure bw of a single copy call and display the correct aggregated bw > ---------------------------------------------------------------------- > > Key: MAPREDUCE-5873 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-5873 > Project: Hadoop Map/Reduce > Issue Type: Bug > Affects Versions: 2.3.0 > Reporter: Siqi Li > Assignee: Siqi Li > Attachments: MAPREDUCE-5873.v1.patch, MAPREDUCE-5873.v2.patch > > > Currently ShuffleScheduler in ReduceTask JVM status displays bandwidth. Its > definition however is confusing because it captures the time where there is > no copying because there is a pause between when new wave of map outputs is > available. > current bw is definded as (bytes copied so far) / (total time in the copy > phase so far) > It would be more useful > 1) to measure bandwidth of a single copy call. > 2) display aggregated bw as long as there is at least one fetcher is in the > copy call. -- This message was sent by Atlassian JIRA (v6.2#6252)