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https://issues.apache.org/jira/browse/HDFS-2802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13412508#comment-13412508
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Hari Mankude commented on HDFS-2802:
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I am attaching an early version of the patch based on the trunk. It took longer
than I expected to rebase the patch. Code needs cleanup, further optimization
of memory usage in the NN, fixes to checkpointing code to handle some border
conditions and more tests. Next steps - Working on splitting the patch into
smaller and easy to review code. Branch HDFS-2802 has been created for this
work. Next version of the design document will be posted soon. (some we
discussed during HDFS meetup).
> Support for RW/RO snapshots in HDFS
> -----------------------------------
>
> Key: HDFS-2802
> URL: https://issues.apache.org/jira/browse/HDFS-2802
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: data-node, name-node
> Affects Versions: 0.24.0
> Reporter: Hari Mankude
> Assignee: Hari Mankude
> Attachments: snapshot-one-pager.pdf
>
>
> Snapshots are point in time images of parts of the filesystem or the entire
> filesystem. Snapshots can be a read-only or a read-write point in time copy
> of the filesystem. There are several use cases for snapshots in HDFS. I will
> post a detailed write-up soon with with more information.
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