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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7535) Utilize Snapshot diff report for distcp
Date Thu, 05 Mar 2015 14:52:44 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14348820#comment-14348820
] 

Hudson commented on HDFS-7535:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #114 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/114/])
HDFS-7535. Utilize Snapshot diff report for distcp. Contributed by Jing Zhao. (jing9: rev
ed70fa142cabdbc1065e4dbbc95e99c8850c4751)
* hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/DistCpConstants.java
* hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/DistCp.java
* hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/CopyListing.java
* hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/mapred/CopyCommitter.java
* hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/OptionsParser.java
* hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/DiffInfo.java
* hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/DistCpSync.java
* hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/DistCpOptions.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* hadoop-tools/hadoop-distcp/src/test/java/org/apache/hadoop/tools/TestOptionsParser.java
* hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/DistCpOptionSwitch.java
* hadoop-tools/hadoop-distcp/src/test/java/org/apache/hadoop/tools/TestDistCpSync.java


> 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
>             Fix For: 2.7.0
>
>         Attachments: HDFS-7535.000.patch, HDFS-7535.001.patch, HDFS-7535.002.patch, HDFS-7535.003.patch,
HDFS-7535.004.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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