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Posted to common-issues@hadoop.apache.org by "Sumangala Patki (Jira)" <ji...@apache.org> on 2021/03/22 11:06:00 UTC

[jira] [Created] (HADOOP-17596) ABFS: Change default Readahead Queue Depth from num(processors) to const

Sumangala Patki created HADOOP-17596:
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             Summary: ABFS: Change default Readahead Queue Depth from num(processors) to const
                 Key: HADOOP-17596
                 URL: https://issues.apache.org/jira/browse/HADOOP-17596
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs/azure
    Affects Versions: 3.3.1
            Reporter: Sumangala Patki


The default value of readahead queue depth is currently set to the number of available processors. However, this can result in one inputstream instance consuming more processor time. To ensure equal thread allocation during read for all inputstreams created in a session, we change the default readahead queue depth to a constant (2).



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