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Posted to common-issues@hadoop.apache.org by "Sumangala Patki (Jira)" <ji...@apache.org> on 2021/03/24 11:11:00 UTC
[jira] [Assigned] (HADOOP-17596) ABFS: Change default Readahead
Queue Depth from num(processors) to const
[ https://issues.apache.org/jira/browse/HADOOP-17596?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sumangala Patki reassigned HADOOP-17596:
----------------------------------------
Assignee: Sumangala Patki
> 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
> Assignee: Sumangala Patki
> Priority: Major
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> 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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