+1 Tsz-Wo
________________________________ From: Suresh Srinivas <sur...@hortonworks.com> To: "hdfs-dev@hadoop.apache.org" <hdfs-dev@hadoop.apache.org> Sent: Wednesday, May 1, 2013 11:54 AM Subject: [VOTE] Merge HDFS-2802 snapshot feature to trunk This is a follow up to my earlier heads up about merging Snapshot feature to trunk - http://markmail.org/message/ixkyku2cebkewnzy. I am happy to announce that we have completed the development of the feature. It is ready to be merged into trunk. Development of snapshot feature is tracked in the jira https://issues.apache.org/jira/browse/HDFS-2802. This is an important feature for HDFS. Please see a brief presentation that describes the feature at a highlevel from the Snapshot discussion meetup we had a while back - https://issues.apache.org/jira/secure/attachment/12552861/Snapshots.pdf. 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 updated design is posted at - https://issues.apache.org/jira/secure/attachment/12581376/Snapshots20120429.pdf. The feature development has involved close to 120 subtasks and close to 25K 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 snapshot. We are also testing non-snapshot code path running tests on a separate cluster without configuring snapshot. Please see the test plan https://issues.apache.org/jira/secure/attachment/12575442/snapshot-testplan.pdf for the details. Once the feature is merged into trunk, we will continue to test and fix any bugs that may be found on the trunk. This feature is a result of many people's collaboration. The bulk of the code and design work was done by Nicholas Sze, Jing Zhao, Hari Mankude, Brandon Li, Aprit Agarwal, Sanjay Radia and me. Thanks to Ramya Sunil for doing feature testing and finding many bugs. Aaron Myers, Konstantin Shvachko, Allen Wittenauer, Chris Nauroth, Todd Lipcon, Michael Stack, Eli Collins, Lars Hofhansl and many others contributed to the feature definition, design and code reviews on the jiras and during meetup. This vote runs for a week and closes on 5/8/2013 at 12:00 pm. Here is my +1 for the merge. Regards, Suresh
