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https://issues.apache.org/jira/browse/HADOOP-18028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17580888#comment-17580888
 ] 

ASF GitHub Bot commented on HADOOP-18028:
-----------------------------------------

hadoop-yetus commented on PR #4752:
URL: https://github.com/apache/hadoop/pull/4752#issuecomment-1218272876

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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   |||| _ Prechecks _ |
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|
   | +0 :ok: |  markdownlint  |   0m  0s |  |  markdownlint was not available.  
|
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   | +1 :green_heart: |  test4tests  |   0m  0s |  |  The patch appears to 
include 25 new or modified test files.  |
   |||| _ trunk Compile Tests _ |
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Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07  |
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when building and testing our client artifacts.  |
   |||| _ Patch Compile Tests _ |
   | +0 :ok: |  mvndep  |   0m 30s |  |  Maven dependency ordering for patch  |
   | +1 :green_heart: |  mvninstall  |   1m 59s |  |  the patch passed  |
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Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07  |
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issues.  |
   | -0 :warning: |  checkstyle  |   4m 51s | 
[/results-checkstyle-root.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4752/1/artifact/out/results-checkstyle-root.txt)
 |  root: The patch generated 1 new + 15 unchanged - 2 fixed = 16 total (was 
17)  |
   | +1 :green_heart: |  mvnsite  |   3m 36s |  |  the patch passed  |
   | +1 :green_heart: |  javadoc  |   2m 30s |  |  the patch passed with JDK 
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Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07  |
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   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  |  19m 41s |  |  hadoop-common in the patch 
passed.  |
   | +1 :green_heart: |  unit  |   3m 34s |  |  hadoop-aws in the patch passed. 
 |
   | +1 :green_heart: |  asflicense  |   1m 31s |  |  The patch does not 
generate ASF License warnings.  |
   |  |   | 276m 11s |  |  |
   
   
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   | Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4752/1/artifact/out/Dockerfile
 |
   | GITHUB PR | https://github.com/apache/hadoop/pull/4752 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall 
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|
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   | Build tool | maven |
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https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4752/1/testReport/ |
   | Max. process+thread count | 2426 (vs. ulimit of 5500) |
   | modules | C: hadoop-common-project/hadoop-common hadoop-tools/hadoop-aws 
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   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4752/1/console |
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   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   




> High performance S3A input stream with prefetching & caching
> ------------------------------------------------------------
>
>                 Key: HADOOP-18028
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18028
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs/s3
>            Reporter: Bhalchandra Pandit
>            Assignee: Bhalchandra Pandit
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 14.5h
>  Remaining Estimate: 0h
>
> I work for Pinterest. I developed a technique for vastly improving read 
> throughput when reading from the S3 file system. It not only helps the 
> sequential read case (like reading a SequenceFile) but also significantly 
> improves read throughput of a random access case (like reading Parquet). This 
> technique has been very useful in significantly improving efficiency of the 
> data processing jobs at Pinterest. 
>  
> I would like to contribute that feature to Apache Hadoop. More details on 
> this technique are available in this blog I wrote recently:
> [https://medium.com/pinterest-engineering/improving-efficiency-and-reducing-runtime-using-s3-read-optimization-b31da4b60fa0]
>  



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