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From Suresh Srinivas <sur...@hortonworks.com>
Subject Heads up - Snapshots feature merge into trunk
Date Sat, 13 Apr 2013 01:05:01 GMT
Support for snapshots feature is being worked on in the jira
https://issues.apache.org/jira/browse/HDFS-2802. This is an important and a
large feature in HDFS. Please see a brief presentation that describes the
feature at a highlevel from the Snapshot discussion meetup we had a while
back -

I am exicted to announce that the feature development will soon be
completed. Please see the jira for the design and the details of the
subtasks. This is a heads up about the merge vote mail that will soon be

Details of development and testing:
Development has been done in a separate branch -
https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2802. The
design is posted at -
The feature development has involved close to 100 subtasks and close to 20K
lines of code.

A lot of unit tests have been added as a part of the feature. We also have
been testing this in a cluster of 5 nodes with a long running test that
mimics a real cluster usage with emphasis on use cases related to
snapshots.  Please see the test plan
the details.

Next steps, before calling for merge vote, we need to get the following
- Add user documentation that describes the feature, and how to use it
- Complete some of the pending tasks
- Continue testing the feature and fix any bugs that might come up
- Update the design document

Thanks to everyone who has participated in design and development of this
feature. Please review the work and help in testing the feature.


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