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https://issues.apache.org/jira/browse/HADOOP-17038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anoop Sam John updated HADOOP-17038:
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Summary: Support disabling buffered reads in ABFS positional reads (was:
Support positional read in AbfsInputStream)
> Support disabling buffered reads in ABFS positional reads
> ---------------------------------------------------------
>
> Key: HADOOP-17038
> URL: https://issues.apache.org/jira/browse/HADOOP-17038
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Priority: Major
> Labels: HBase, abfsactive, pull-request-available
> Attachments: HBase Perf Test Report.xlsx, screenshot-1.png
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> Right now it will do a seek to the position , read and then seek back to the
> old position. (As per the impl in the super class)
> In HBase kind of workloads we rely mostly on short preads. (like 64 KB size
> by default). So would be ideal to support a pure pos read API which will not
> even keep the data in a buffer but will only read the required data as what
> is asked for by the caller. (Not reading ahead more data as per the read size
> config)
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