[
https://issues.apache.org/jira/browse/HADOOP-17770?focusedWorklogId=626440&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-626440
]
ASF GitHub Bot logged work on HADOOP-17770:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 22/Jul/21 05:44
Start Date: 22/Jul/21 05:44
Worklog Time Spent: 10m
Work Description: hadoop-yetus commented on pull request #3223:
URL: https://github.com/apache/hadoop/pull/3223#issuecomment-884669031
:confetti_ball: **+1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 0m 32s | | Docker mode activated. |
|||| _ Prechecks _ |
| +1 :green_heart: | dupname | 0m 0s | | No case conflicting files
found. |
| +0 :ok: | codespell | 0m 0s | | codespell was not available. |
| +1 :green_heart: | @author | 0m 0s | | The patch does not contain
any @author tags. |
|||| _ trunk Compile Tests _ |
| +1 :green_heart: | shadedclient | 18m 47s | | branch has no errors
when building and testing our client artifacts. |
|||| _ Patch Compile Tests _ |
| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks
issues. |
| +1 :green_heart: | xml | 0m 1s | | The patch has no ill-formed XML
file. |
| +1 :green_heart: | shadedclient | 13m 1s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| +1 :green_heart: | asflicense | 0m 35s | | The patch does not
generate ASF License warnings. |
| | | 34m 41s | | |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.41 ServerAPI=1.41 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3223/2/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/3223 |
| Optional Tests | dupname asflicense codespell xml |
| uname | Linux 764c7be2129b 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6
11:12:41 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / d6304e06cbd41ec3c24a5cdea5dac82c3bb0128e |
| Max. process+thread count | 696 (vs. ulimit of 5500) |
| modules | C: hadoop-tools/hadoop-azure U: hadoop-tools/hadoop-azure |
| Console output |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3223/2/console |
| versions | git=2.25.1 maven=3.6.3 |
| Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |
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Issue Time Tracking
-------------------
Worklog Id: (was: 626440)
Time Spent: 4h 10m (was: 4h)
> 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: 4h 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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