The first release candidate for HBase 2.0.0-alpha-3 is up at: https://dist.apache.org/repos/dist/dev/hbase/hbase-2.0.0-alpha-3RC0/
Maven artifacts are available from a staging directory here: https://repository.apache.org/content/repositories/orgapachehbase-1175 All was signed with my key at y 8ACC93D2 <http://pgp.mit.edu/pks/lookup?op=get&search=0x9816C7FC8ACC93D2> I tagged the RC as 2.0.0-alpha-3RC0.2 (a5c8461ca87d6324f16ffd126b765146fdd5315a) hbase-2.0.0-alpha-3 is our third alpha release on our march toward an hbase-2.0.0. It includes all that was in previous alphas (new assignment manager, offheap read/write path, in-memory compactions, etc.), but had a focus on polishing our public API: old API that had been deprecated since hbase-1.0.0 or before was purged and new API was added with sympathetic deprecation of the previous. Along the Admin plane, incompatible changes were unavoidable; you will not be able to administer a hbase2 cluster using an hbase1 client (see adjacent "[DISCUSS] hbase-2.0.0 compatibility expectations" thread for discussion and see [1] for current list of Incompatibles). What is here will be our public API for 2.0.0 unless we get pushback from our gracious downstreamers. Please try it out. Shout now if you find a problem so we can fix it before we get to beta. Alpha-3 does not have the final version of our Coprocessor API. Finishing the Coprocessor API for hbase-2.0.0 is the topic of our last planned alpha, 2.0.0-alpha-4. The Coprocessor API changes pretty radically in hbase-2.0.0 (though Coprocessor Endpoints will continue to work across an upgrade). See [2] for why and why it was unavoidable. Input now from Coprocessor API users before alpha-4 would be especially effective (I've cc'd our Phoenix brothers and sisters toward this end). hbase-2.0.0-alpha-3RC0 is a rough cut ('alpha'), not-for-production preview of what hbase-2.0.0 will look like. It is meant for devs and downstreamers to test drive and flag us early if we messed up anything ahead of our rolling GAs. The list of features addressed in 2.0.0 so far can be found here [3]. There are about 2700+. The list of ~500 fixes in 2.0.0 exclusively can be found here [3]. I've updated our overview doc. on the state of 2.0.0 [6] but JIRA 2.0.0 label [5] has undergone extensive weeding and presents a fairly good picture on what is yet to do before we 2.0.0. Check it out. Please take it for a spin and vote on whether it ok to put out as our first alpha (bar is low for an 'alpha'). Let the VOTE be open for 72 hours (Sunday) Thanks, St.Ack 1. Current list of Incompatibles: https://docs.google.com/document/d/1WCsVlnHjJeKUcl7wHwqb4z9iEu_ktczrlKHK8N4SZzs/edit#heading=h.723jjn18p2jr 2. Why CPs are Incompatible: https://docs.google.com/document/d/1WCsVlnHjJeKUcl7wHwqb4z9iEu_ktczrlKHK8N4SZzs/edit#heading=h.9k7mjbauv0wj 3. goo.gl/Gcrp4f 4. goo.gl/6dPqzG 5. https://issues.apache.org/jira/projects/HBASE/versions/12327188 6. https://docs.google.com/document/d/1WCsVlnHjJeKUcl7wHwqb4z9iEu_ktczrlKHK8N4SZzs/
