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https://issues.apache.org/jira/browse/HDFS-2802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13490951#comment-13490951
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Suresh Srinivas commented on HDFS-2802:
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bq. It would be useful to allow users to be able to set directories in their
own home dir as 'snapshottable'.
Jagane. This is really a good idea. This makes the administration simpler. Will
add it to the next iteration of design doc.
bq. We think these are fundamental requirements that should be addressed in the
initial design vs fixed up later;
Eli, please read the comments. While this is how the discussions started, I
disagree in this case we could not have incrementally improved it. Anyway
discussing this is a moot point now, because we reorganized our work and have
addressed the issues brought up and the efficient implementation is now almost
done.
bq. If Suresh and Nicholas now agree, which I think they do, correct me if I'm
wrong, that we should come up with a design that handles these requirements
first, rather than go with the original approach and modify it later then I
think we should merge these two design documents, which is what ATM was
attempting to do.
I am not sure if you are on top of all the discussions and design udpates. The
design has already addressed the concerns here. Please read why this design is
superior as well
[here|https://issues.apache.org/jira/browse/HDFS-2802?focusedCommentId=13487447&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13487447]
> 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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