[jira] [Commented] (MAPREDUCE-5907) Improve getSplits() performance for fs implementations that can utilize performance gains from recursive listing
[
https://issues.apache.org/jira/browse/MAPREDUCE-5907?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17469445#comment-17469445
]
Hadoop QA commented on MAPREDUCE-5907:
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|| Vote || Subsystem || Runtime || Logfile || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
0s{color} | {color:blue}{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 9s{color}
| {color:red}{color} | {color:red} MAPREDUCE-5907 does not apply to trunk.
Rebase required? Wrong Branch? See
https://wiki.apache.org/hadoop/HowToContribute for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | MAPREDUCE-5907 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12648040/MAPREDUCE-5907-3.patch
|
| Console output |
https://ci-hadoop.apache.org/job/PreCommit-MAPREDUCE-Build/87/console |
| versions | git=2.17.1 |
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This message was automatically generated.
> Improve getSplits() performance for fs implementations that can utilize
> performance gains from recursive listing
>
>
> Key: MAPREDUCE-5907
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5907
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: client
>Affects Versions: 2.4.0
>Reporter: Sumit Kumar
>Assignee: Sumit Kumar
>Priority: Major
> Attachments: MAPREDUCE-5907-2.patch, MAPREDUCE-5907-3.patch,
> MAPREDUCE-5907.patch
>
>
> FileInputFormat (both mapreduce and mapred implementations) use recursive
> listing while calculating splits. They however do this by doing listing level
> by level. That means to discover files in /foo/bar means they do listing at
> /foo/bar first to get the immediate children, then make the same call on all
> immediate children for /foo/bar to discover their immediate children and so
> on. This doesn't scale well for object store based fs implementations like s3
> and swift because every listStatus call ends up being a webservice call to
> backend. In cases where large number of files are considered for input, this
> makes getSplits() call slow.
> This patch adds a new set of recursive list apis that gives opportunity to
> the fs implementations to optimize. The behavior remains the same for other
> implementations (that is a default implementation is provided for other fs so
> they don't have to implement anything new). However for objectstore based fs
> implementations it provides a simple change to include recursive flag as true
> (as shown in the patch) to improve listing performance.
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[jira] [Commented] (MAPREDUCE-5907) Improve getSplits() performance for fs implementations that can utilize performance gains from recursive listing
[ https://issues.apache.org/jira/browse/MAPREDUCE-5907?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17469434#comment-17469434 ] Steve Loughran commented on MAPREDUCE-5907: --- abfs now does incremental listing, but not deep ones > Improve getSplits() performance for fs implementations that can utilize > performance gains from recursive listing > > > Key: MAPREDUCE-5907 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-5907 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Components: client >Affects Versions: 2.4.0 >Reporter: Sumit Kumar >Assignee: Sumit Kumar >Priority: Major > Attachments: MAPREDUCE-5907-2.patch, MAPREDUCE-5907-3.patch, > MAPREDUCE-5907.patch > > > FileInputFormat (both mapreduce and mapred implementations) use recursive > listing while calculating splits. They however do this by doing listing level > by level. That means to discover files in /foo/bar means they do listing at > /foo/bar first to get the immediate children, then make the same call on all > immediate children for /foo/bar to discover their immediate children and so > on. This doesn't scale well for object store based fs implementations like s3 > and swift because every listStatus call ends up being a webservice call to > backend. In cases where large number of files are considered for input, this > makes getSplits() call slow. > This patch adds a new set of recursive list apis that gives opportunity to > the fs implementations to optimize. The behavior remains the same for other > implementations (that is a default implementation is provided for other fs so > they don't have to implement anything new). However for objectstore based fs > implementations it provides a simple change to include recursive flag as true > (as shown in the patch) to improve listing performance. -- This message was sent by Atlassian Jira (v8.20.1#820001) - To unsubscribe, e-mail: mapreduce-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: mapreduce-issues-h...@hadoop.apache.org
[jira] [Work logged] (MAPREDUCE-7371) DistributedCache alternative APIs should not use DistributedCache APIs internally
[
https://issues.apache.org/jira/browse/MAPREDUCE-7371?focusedWorklogId=703896=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-703896
]
ASF GitHub Bot logged work on MAPREDUCE-7371:
-
Author: ASF GitHub Bot
Created on: 05/Jan/22 12:09
Start Date: 05/Jan/22 12:09
Worklog Time Spent: 10m
Work Description: hadoop-yetus commented on pull request #3855:
URL: https://github.com/apache/hadoop/pull/3855#issuecomment-1005630630
:confetti_ball: **+1 overall**
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| Subsystem | Report/Notes |
|--:|:-|
| Docker | ClientAPI=1.41 ServerAPI=1.41 base:
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| GITHUB PR | https://github.com/apache/hadoop/pull/3855 |
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| uname | Linux 8871ebdcb38b 4.15.0-163-generic #171-Ubuntu SMP Fri Nov 5
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| Build tool | maven |
|
[jira] [Work logged] (MAPREDUCE-7371) DistributedCache alternative APIs should not use DistributedCache APIs internally
[
https://issues.apache.org/jira/browse/MAPREDUCE-7371?focusedWorklogId=703895=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-703895
]
ASF GitHub Bot logged work on MAPREDUCE-7371:
-
Author: ASF GitHub Bot
Created on: 05/Jan/22 12:07
Start Date: 05/Jan/22 12:07
Worklog Time Spent: 10m
Work Description: hadoop-yetus commented on pull request #3855:
URL: https://github.com/apache/hadoop/pull/3855#issuecomment-1005629624
:confetti_ball: **+1 overall**
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_ Prechecks _ |
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found. |
| +0 :ok: | codespell | 0m 0s | | codespell was not available. |
| +1 :green_heart: | @author | 0m 0s | | The patch does not contain
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| +1 :green_heart: | test4tests | 0m 0s | | The patch appears to
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| +0 :ok: | mvndep | 0m 25s | | Maven dependency ordering for patch |
| +1 :green_heart: | mvninstall | 1m 58s | | the patch passed |
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|--:|:-|
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