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Posted to common-issues@hadoop.apache.org by "developersarm (via GitHub)" <gi...@apache.org> on 2023/05/10 21:36:40 UTC

[GitHub] [hadoop] developersarm opened a new pull request, #5640: HADOOP-18739: Parallelize concatenation of distcp chunks of separate files

developersarm opened a new pull request, #5640:
URL: https://github.com/apache/hadoop/pull/5640

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   ### Description of PR
   While copying a folder containing large files consisting of multiple distcp chunks, copy committer synchronously picks chunks of each file and concatenates them. This is very slow.
   As part of this PR, we are parallelising the concatenation of distcp chunks of separate files with a default thread pool of size 10.
   
   ### How was this patch tested?
   * Existing unit tests are passing which are testing both failure and success scenarios.
   * Tested the patch on distributed cloud setup by running a distcp job for copying a folder of size 100GB having 20 files of size 5GB from one cluster to another. Noticed an improvement of 2 mins in latency.
   
   ### For code changes:
   
   - [x] Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
   - [ ] Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
   - [ ] If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under [ASF 2.0](http://www.apache.org/legal/resolved.html#category-a)?
   - [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`, `NOTICE-binary` files?
   
   


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[GitHub] [hadoop] hadoop-yetus commented on pull request #5640: HADOOP-18739: Parallelize concatenation of distcp chunks of separate files

Posted by "hadoop-yetus (via GitHub)" <gi...@apache.org>.
hadoop-yetus commented on PR #5640:
URL: https://github.com/apache/hadoop/pull/5640#issuecomment-1542925543

   :broken_heart: **-1 overall**
   
   
   
   
   
   
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[GitHub] [hadoop] hadoop-yetus commented on pull request #5640: HADOOP-18739: Parallelize concatenation of distcp chunks of separate files

Posted by "hadoop-yetus (via GitHub)" <gi...@apache.org>.
hadoop-yetus commented on PR #5640:
URL: https://github.com/apache/hadoop/pull/5640#issuecomment-1545674155

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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   This message was automatically generated.
   
   


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[GitHub] [hadoop] hadoop-yetus commented on pull request #5640: HADOOP-18739: Parallelize concatenation of distcp chunks of separate files

Posted by "hadoop-yetus (via GitHub)" <gi...@apache.org>.
hadoop-yetus commented on PR #5640:
URL: https://github.com/apache/hadoop/pull/5640#issuecomment-1546943511

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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   This message was automatically generated.
   
   


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[GitHub] [hadoop] hadoop-yetus commented on pull request #5640: HADOOP-18739: Parallelize concatenation of distcp chunks of separate files

Posted by "hadoop-yetus (via GitHub)" <gi...@apache.org>.
hadoop-yetus commented on PR #5640:
URL: https://github.com/apache/hadoop/pull/5640#issuecomment-1543494792

   :broken_heart: **-1 overall**
   
   
   
   
   
   
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   | -1 :x: |  test4tests  |   0m  0s |  |  The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.  |
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[GitHub] [hadoop] hadoop-yetus commented on pull request #5640: HADOOP-18739: Parallelize concatenation of distcp chunks of separate files

Posted by "hadoop-yetus (via GitHub)" <gi...@apache.org>.
hadoop-yetus commented on PR #5640:
URL: https://github.com/apache/hadoop/pull/5640#issuecomment-1545689229

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
   |:----:|----------:|--------:|:--------:|:-------:|
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   |||| _ Prechecks _ |
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   | +1 :green_heart: |  @author  |   0m  0s |  |  The patch does not contain any @author tags.  |
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   |||| _ trunk Compile Tests _ |
   | +1 :green_heart: |  mvninstall  |  35m 33s |  |  trunk passed  |
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   |||| _ Patch Compile Tests _ |
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   | +1 :green_heart: |  javac  |   0m 21s |  |  the patch passed  |
   | +1 :green_heart: |  compile  |   0m 18s |  |  the patch passed with JDK Private Build-1.8.0_362-8u362-ga-0ubuntu1~20.04.1-b09  |
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   | +1 :green_heart: |  blanks  |   0m  0s |  |  The patch has no blanks issues.  |
   | +1 :green_heart: |  checkstyle  |   0m 14s |  |  the patch passed  |
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   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  |  14m 47s |  |  hadoop-distcp in the patch passed.  |
   | +1 :green_heart: |  asflicense  |   0m 33s |  |  The patch does not generate ASF License warnings.  |
   |  |   | 106m 52s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.42 ServerAPI=1.42 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5640/4/artifact/out/Dockerfile |
   | GITHUB PR | https://github.com/apache/hadoop/pull/5640 |
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   | versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   


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