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Posted to common-issues@hadoop.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/03/22 12:05:00 UTC
[jira] [Work logged] (HADOOP-17596) ABFS: Change default Readahead
Queue Depth from num(processors) to const
[ https://issues.apache.org/jira/browse/HADOOP-17596?focusedWorklogId=569659&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-569659 ]
ASF GitHub Bot logged work on HADOOP-17596:
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Author: ASF GitHub Bot
Created on: 22/Mar/21 12:04
Start Date: 22/Mar/21 12:04
Worklog Time Spent: 10m
Work Description: sumangala-patki opened a new pull request #2795:
URL: https://github.com/apache/hadoop/pull/2795
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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Issue Time Tracking
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Worklog Id: (was: 569659)
Remaining Estimate: 0h
Time Spent: 10m
> 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
> Priority: Major
> Time Spent: 10m
> 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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