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https://issues.apache.org/jira/browse/MAPREDUCE-2257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13012260#comment-13012260
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Hadoop QA commented on MAPREDUCE-2257:
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-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12474806/MAPREDUCE-2257.patch
against trunk revision 1082703.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 4 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
-1 javac. The applied patch generated 2256 javac compiler warnings (more
than the trunk's current 2244 warnings).
-1 findbugs. The patch appears to introduce 1 new Findbugs (version 1.3.9)
warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed core unit tests.
-1 contrib tests. The patch failed contrib unit tests.
+1 system test framework. The patch passed system test framework compile.
Test results:
https://hudson.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/147//testReport/
Findbugs warnings:
https://hudson.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/147//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output:
https://hudson.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/147//console
This message is automatically generated.
> distcp can copy blocks in parallel
> ----------------------------------
>
> Key: MAPREDUCE-2257
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2257
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: distcp
> Affects Versions: 0.21.0
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Attachments: MAPREDUCE-2257.patch
>
>
> The minimum unit of work for a distcp task is a file. We have files that are
> greater than 1 TB with a block size of 1 GB. If we use distcp to copy these
> files, the tasks either take a long long long time or finally fails. A better
> way for distcp would be to copy all the source blocks in parallel, and then
> stich the blocks back to files at the destination via the HDFS Concat API
> (HDFS-222)
--
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