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https://issues.apache.org/jira/browse/HDFS-4111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13485015#comment-13485015
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Suresh Srinivas edited comment on HDFS-4111 at 10/26/12 4:01 PM:
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Todd, you might not have had time to catchup with the comment. For convenience,
the goal is not O{n} - see
[here|https://issues.apache.org/jira/browse/HDFS-2802?focusedCommentId=13481069&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13481069],
[here|https://issues.apache.org/jira/browse/HDFS-2802?focusedCommentId=13481758&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13481758]
and
[here|https://issues.apache.org/jira/browse/HDFS-2802?focusedCommentId=13481853&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13481853]
Hopefully we start getting the tests in place now with inefficient/but simple
snapshot mechanism. This will help validate the functionality as we make
optimizations to the current code for time and space efficiency. Hopefully that
turns the thumb to the right orientation :-)
was (Author: sureshms):
Todd, you might not have had time to catchup with the comment. For
convenience, the goal is not O(n) - see
[here|https://issues.apache.org/jira/browse/HDFS-2802?focusedCommentId=13481069&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13481069],
[here|https://issues.apache.org/jira/browse/HDFS-2802?focusedCommentId=13481758&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13481758]
and
[here|https://issues.apache.org/jira/browse/HDFS-2802?focusedCommentId=13481853&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13481853]
Hopefully we start getting the tests in place now with inefficient/but simple
snapshot mechanism. This will help validate the functionality as we make
optimizations to the current code for time and space efficiency. Hopefully that
turns the the right orientation :-)
> Support snapshot of subtrees
> ----------------------------
>
> Key: HDFS-4111
> URL: https://issues.apache.org/jira/browse/HDFS-4111
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: name-node
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Labels: needs-test
> Attachments: h4111_20121025.patch
>
>
> HDFS-4076 add the ability to take snapshot of single files. In this JIRA, we
> add the ability to take snapshot of subtree trees in the namesystem.
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