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https://issues.apache.org/jira/browse/HDFS-12544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16219814#comment-16219814
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Hudson commented on HDFS-12544:
-------------------------------
FAILURE: Integrated in Jenkins build Hadoop-trunk-Commit #13138 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/13138/])
HDFS-12544. SnapshotDiff - support diff generation on any snapshot root
(manojpec: rev 075dd45a24398dcdcddd60da995f0dc152eee321)
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeDirectory.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestSnapshotDiffReport.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/SnapshotManager.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/SnapshotDiffInfo.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/DirectorySnapshottableFeature.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
* (add)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestSnapRootDescendantDiff.java
> SnapshotDiff - support diff generation on any snapshot root descendant
> directory
> --------------------------------------------------------------------------------
>
> Key: HDFS-12544
> URL: https://issues.apache.org/jira/browse/HDFS-12544
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs
> Affects Versions: 3.0.0-beta1
> Reporter: Manoj Govindassamy
> Assignee: Manoj Govindassamy
> Fix For: 3.0.0
>
> Attachments: HDFS-12544.01.patch, HDFS-12544.02.patch,
> HDFS-12544.03.patch, HDFS-12544.04.patch, HDFS-12544.05.patch
>
>
> {noformat}
> # hdfs snapshotDiff <snapshot_root_path> <from_snapshot_name>
> <to_snapshot_name>
> {noformat}
> Using snapshot diff command, we can generate a diff report between any two
> given snapshots under a snapshot root directory. The command today only
> accepts the path that is a snapshot root. There are many deployments where
> the snapshot root is configured at the higher level directory but the diff
> report needed is only for a specific directory under the snapshot root. In
> these cases, the diff report can be filtered for changes pertaining to the
> directory we are interested in. But when the snapshot root directory is very
> huge, the snapshot diff report generation can take minutes even if we are
> interested to know the changes only in a small directory. So, it would be
> highly performant if the diff report calculation can be limited to only the
> interesting sub-directory of the snapshot root instead of the whole snapshot
> root.
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