Hello all, I would like to call a vote to merge phase 1 of the Heterogeneous Storage feature into trunk.
*Scope of the changes:* The changes allow exposing the DataNode as a collection of storages and set the foundation for subsequent work to present Heterogeneous Storages to applications. This allows DataNodes to send block and storage reports per-storage. In addition this change introduces the ability to add a 'storage type' tag to the storage directories. This enables supporting different types of storages in addition to disk storage. Development of the feature is tracked in the jira https://issues.apache.org/jira/browse/HDFS-2832. *Details of development and testing:* Development has been done in a separate branch - https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2832. The updated design is posted at - https://issues.apache.org/jira/secure/attachment/12615761/20131125-HeterogeneousStorage.pdf. The changes involve ~6K changed lines of code, with a third of those changes being to tests. Please see the test plan https://issues.apache.org/jira/secure/attachment/12616642/20131202-HeterogeneousStorage-TestPlan.pdffor the details. Once the feature is merged into trunk, we will continue to test and fix any bugs that may be found on trunk as well as add further tests as outlined in the test plan. The bulk of the design and implementation was done by Suresh Srinivas, Sanjay Radia, Nicholas Sze, Junping Du and me. Also, thanks to Eric Sirianni, Chris Nauroth, Steve Loughran, Bikas Saha, Andrew Wang and Todd Lipcon for providing feedback on the Jiras and in discussions. This vote runs for a week and closes on 12/9/2013 at 11:59 pm PT. Thanks, Arpit -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
