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https://issues.apache.org/jira/browse/MAPREDUCE-5899?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14005818#comment-14005818
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Hadoop QA commented on MAPREDUCE-5899:
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{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12646174/MAPREDUCE-5899.002.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 5 new
or modified test files.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. There were no new javadoc warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:red}-1 core tests{color}. The patch failed these unit tests in
hadoop-common-project/hadoop-common hadoop-hdfs-project/hadoop-hdfs
hadoop-tools/hadoop-distcp:
org.apache.hadoop.tools.mapred.TestUniformSizeInputFormat
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-HADOOP-Build/3960//testReport/
Console output:
https://builds.apache.org/job/PreCommit-HADOOP-Build/3960//console
This message is automatically generated.
> Support incremental data copy in DistCp
> ---------------------------------------
>
> Key: MAPREDUCE-5899
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5899
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: distcp
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Attachments: HADOOP-10608.000.patch, HADOOP-10608.001.patch,
> MAPREDUCE-5899.002.patch, MAPREDUCE-5899.002.patch
>
>
> Currently when doing distcp with -update option, for two files with the same
> file names but with different file length or checksum, we overwrite the whole
> file. It will be good if we can detect the case where (sourceFile =
> targetFile + appended_data), and only transfer the appended data segment to
> the target. This will be very useful if we're doing incremental distcp.
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