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https://issues.apache.org/jira/browse/HDFS-7535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14326466#comment-14326466
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Hadoop QA commented on HDFS-7535:
---------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12699520/HDFS-7535.002.patch
against trunk revision 1714609.
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 1 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 2.0.3) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
hadoop-tools/hadoop-distcp.
Test results:
https://builds.apache.org/job/PreCommit-HDFS-Build/9610//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/9610//console
This message is automatically generated.
> Utilize Snapshot diff report for distcp
> ---------------------------------------
>
> Key: HDFS-7535
> URL: https://issues.apache.org/jira/browse/HDFS-7535
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: distcp, snapshots
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Attachments: HDFS-7535.000.patch, HDFS-7535.001.patch,
> HDFS-7535.002.patch
>
>
> Currently HDFS snapshot diff report can identify file/directory creation,
> deletion, rename and modification under a snapshottable directory. We can use
> the diff report for distcp between the primary cluster and a backup cluster
> to avoid unnecessary data copy. This is especially useful when there is a big
> directory rename happening in the primary cluster: the current distcp cannot
> detect the rename op thus this rename usually leads to large amounts of real
> data copy.
> More details of the approach will come in the first comment.
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