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https://issues.apache.org/jira/browse/HADOOP-17038?focusedWorklogId=496612&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-496612
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ASF GitHub Bot logged work on HADOOP-17038:
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Author: ASF GitHub Bot
Created on: 07/Oct/20 13:44
Start Date: 07/Oct/20 13:44
Worklog Time Spent: 10m
Work Description: anoopsjohn commented on pull request #2206:
URL: https://github.com/apache/hadoop/pull/2206#issuecomment-704945504
oh sorry.. i closed my patch branch.. i will give new version based on
openFile() way as discussed above.. Will include all tests in that too.
Started working on new patch
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Issue Time Tracking
-------------------
Worklog Id: (was: 496612)
Time Spent: 40m (was: 0.5h)
> Support positional read in AbfsInputStream
> ------------------------------------------
>
> 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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