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https://issues.apache.org/jira/browse/HADOOP-14407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16022643#comment-16022643
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Omkar Aradhya K S edited comment on HADOOP-14407 at 5/24/17 10:06 AM:
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[~yzhangal] Thanks for pointing this out! I have couple of doubts:
1. My tests are present in
"/hadoop-distcp/src/test/java/org/apache/hadoop/tools/TestOptionsParser.java"
--> testToString(), testParseCopyBufferSize().
2. The
"/hadoop-distcp/src/test/java/org/apache/hadoop/tools/TestDistCpOptions.java
--> " doesn't have "blocksPerChunk=0" so how was it passing earlier?
3. Why are there 2 redundant "testToString()" in 2 different classes?
4. Can I re-open this issue and add the patch here itself?
5. What is the procedure to test branch-2 patches? I see a "-1" from Hadoop QA
for the branch-2 patch above!
was (Author: omkarksa):
[~yzhangal] Thanks for pointing this out! I have couple of doubts:
1. The
"/hadoop-distcp/src/test/java/org/apache/hadoop/tools/TestDistCpOptions.java"
doesn't have "blocksPerChunk=0" so how was it passing earlier?
2. Can I re-open this issue and add the patch here itself?
3. What is the procedure to test branch-2 patches? I see a "-1" from Hadoop QA
for the branch-2 patch above!
> DistCp - Introduce a configurable copy buffer size
> --------------------------------------------------
>
> Key: HADOOP-14407
> URL: https://issues.apache.org/jira/browse/HADOOP-14407
> Project: Hadoop Common
> Issue Type: Improvement
> Components: tools/distcp
> Affects Versions: 2.9.0
> Reporter: Omkar Aradhya K S
> Assignee: Omkar Aradhya K S
> Fix For: 2.9.0, 3.0.0-alpha3
>
> Attachments: HADOOP-14407.001.patch, HADOOP-14407.002.patch,
> HADOOP-14407.002.patch, HADOOP-14407.003.patch,
> HADOOP-14407.004.branch2.patch, HADOOP-14407.004.patch,
> HADOOP-14407.004.patch, TotalTime-vs-CopyBufferSize.jpg
>
>
> Currently, the RetriableFileCopyCommand has a fixed copy buffer size of just
> 8KB. We have noticed in our performance tests that with bigger buffer sizes
> we saw upto ~3x performance boost. Hence, making the copy buffer size a
> configurable setting via the new parameter <copybuffersize>.
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