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https://issues.apache.org/jira/browse/HDFS-2802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13489623#comment-13489623
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Daryn Sharp commented on HDFS-2802:
-----------------------------------
I really need to catch up on this jira but the shell discussion caught my eye.
W/o knowing all the details, I'm a bit uneasy about enforcing a policy on
shapshots at the client level unless it's just a convenience. I'll read the
doc this weekend to understand why standard permissions are insufficient.
Anyway, I eventually plan to allow option bundling ala the unix shell, so
choosing "s" or any existing ls option is ill advised. Maybe --snapshot to
help ensure we don't collide with real ls flags.
> 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
> Reporter: Hari Mankude
> Assignee: Hari Mankude
> Attachments: HDFS-2802.20121101.patch,
> HDFS-2802-meeting-minutes-121101.txt, HDFSSnapshotsDesign.pdf, snap.patch,
> snapshot-design.pdf, snapshot-design.tex, snapshot-one-pager.pdf,
> Snapshots20121018.pdf, Snapshots20121030.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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