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https://issues.apache.org/jira/browse/HDFS-8828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14652728#comment-14652728
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Hadoop QA commented on HDFS-8828:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch | 15m 22s | Pre-patch trunk compilation is
healthy. |
| {color:green}+1{color} | @author | 0m 0s | The patch does not contain any
@author tags. |
| {color:green}+1{color} | tests included | 0m 0s | The patch appears to
include 2 new or modified test files. |
| {color:green}+1{color} | javac | 7m 33s | There were no new javac warning
messages. |
| {color:red}-1{color} | javadoc | 9m 37s | The applied patch generated 2
additional warning messages. |
| {color:green}+1{color} | release audit | 0m 24s | The applied patch does
not increase the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle | 0m 25s | There were no new checkstyle
issues. |
| {color:green}+1{color} | whitespace | 0m 4s | The patch has no lines that
end in whitespace. |
| {color:green}+1{color} | install | 1m 22s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse | 0m 34s | The patch built with
eclipse:eclipse. |
| {color:green}+1{color} | findbugs | 0m 47s | The patch does not introduce
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | tools/hadoop tests | 6m 19s | Tests passed in
hadoop-distcp. |
| | | 42m 32s | |
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|| Subsystem || Report/Notes ||
| Patch URL |
http://issues.apache.org/jira/secure/attachment/12748535/HDFS-8828.003.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 469cfcd |
| javadoc |
https://builds.apache.org/job/PreCommit-HDFS-Build/11891/artifact/patchprocess/diffJavadocWarnings.txt
|
| hadoop-distcp test log |
https://builds.apache.org/job/PreCommit-HDFS-Build/11891/artifact/patchprocess/testrun_hadoop-distcp.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/11891/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf906.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output |
https://builds.apache.org/job/PreCommit-HDFS-Build/11891/console |
This message was automatically generated.
> Utilize Snapshot diff report to build copy list in distcp
> ---------------------------------------------------------
>
> Key: HDFS-8828
> URL: https://issues.apache.org/jira/browse/HDFS-8828
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: distcp, snapshots
> Reporter: Yufei Gu
> Assignee: Yufei Gu
> Attachments: HDFS-8828.001.patch, HDFS-8828.002.patch,
> HDFS-8828.003.patch
>
>
> Some users reported huge time cost to build file copy list in distcp. (30
> hours for 1.6M files). We can leverage snapshot diff report to build file
> copy list including files/dirs which are changes only between two snapshots
> (or a snapshot and a normal dir). It speed up the process in two folds: 1.
> less copy list building time. 2. less file copy MR jobs.
> HDFS snapshot diff report provide information about file/directory creation,
> deletion, rename and modification between two snapshots or a snapshot and a
> normal directory. HDFS-7535 synchronize deletion and rename, then fallback to
> the default distcp. So it still relies on default distcp to building complete
> list of files under the source dir. This patch only puts creation and
> modification files into the copy list based on snapshot diff report. We can
> minimize the number of files to copy.
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