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https://issues.apache.org/jira/browse/HADOOP-17770?focusedWorklogId=626405&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-626405
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ASF GitHub Bot logged work on HADOOP-17770:
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Author: ASF GitHub Bot
Created on: 22/Jul/21 02:53
Start Date: 22/Jul/21 02:53
Worklog Time Spent: 10m
Work Description: aajisaka commented on pull request #3149:
URL: https://github.com/apache/hadoop/pull/3149#issuecomment-884623018
> spotbugs : Internally synchronization for "in" is taken care.
@anoopsjohn @surendralilhore Would you update findbugs-exclude.xml to ignore
the warning?
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Issue Time Tracking
-------------------
Worklog Id: (was: 626405)
Time Spent: 3h 10m (was: 3h)
> WASB : Support disabling buffered reads in positional reads
> -----------------------------------------------------------
>
> Key: HADOOP-17770
> URL: https://issues.apache.org/jira/browse/HADOOP-17770
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Attachments: AvgLatency_0 cache hit.png, AvgLatency_50% cache
> hit.png, Throughput_0 cache hit.png, Throughput_50% cache hit.png
>
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> This is just like HADOOP-17038
> 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)
> Allow an optional boolean config to be specified while opening file for read
> using which buffered pread can be disabled.
> FutureDataInputStreamBuilder openFile(Path path)
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