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Rajesh Balamohan commented on TEZ-3334: --------------------------------------- +1 for custom shuffle handler. >> "fetching 100 pieces serially from the same mapper " If keep-alive connections are enabled in tez and in NM, would this be to mainly reduce the number of round trips?. > Tez Custom Shuffle Handler > -------------------------- > > Key: TEZ-3334 > URL: https://issues.apache.org/jira/browse/TEZ-3334 > Project: Apache Tez > Issue Type: Bug > Reporter: Jonathan Eagles > > For conditions where auto-parallelism is reduced (e.g. TEZ-3222), a custom > shuffle handler could help reduce the number of fetches and could more > efficiently fetch data. In particular if a reducer is fetching 100 pieces > serially from the same mapper it could do this in one fetch call. -- This message was sent by Atlassian JIRA (v6.3.4#6332)