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Posted to issues@spark.apache.org by "Raajay Viswanathan (JIRA)" <ji...@apache.org> on 2017/07/19 17:50:00 UTC

[jira] [Created] (SPARK-21474) Make number of parallel fetches from a reducer configurable

Raajay Viswanathan created SPARK-21474:
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             Summary: Make number of parallel fetches from a reducer configurable
                 Key: SPARK-21474
                 URL: https://issues.apache.org/jira/browse/SPARK-21474
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 2.2.0
            Reporter: Raajay Viswanathan
            Priority: Minor


Currently the number of parallel fetches is hard-coded to 5. As a result the size of each fetch request is fixed at 1/5th of maxSizeInFlights. Since, chunks are requested in bursts of fetchRequests; the size of a burst to a single shuffle service can be high for large maxSizeInFlight



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