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https://issues.apache.org/jira/browse/HDFS-4133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13488542#comment-13488542
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Suresh Srinivas commented on HDFS-4133:
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First time around I did not understand the prepareModifications method. It is
pretty clever. Thanks for documenting the loop.
+1 for the patch.
> Add testcases for testing basic snapshot functionalities
> --------------------------------------------------------
>
> Key: HDFS-4133
> URL: https://issues.apache.org/jira/browse/HDFS-4133
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node, name-node
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Attachments: HDFS-4133.001.patch, HDFS-4133-test.002.patch,
> HDFS-4133-test.002.patch
>
>
> Add testcase for basic snapshot functionalities. In the test we keep creating
> snapshots, modifying original files, and check previous snapshots.
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