The HBase team is happy to announce the immediate availability of Apache HBase 2.0.0-alpha-2.
Apache HBase is an open-source, distributed, versioned, non-relational database. Apache HBase gives you low latency random access to billions of rows with millions of columns atop non-specialized hardware. To learn more about HBase, see https://hbase.apache.org/. HBase 2.0.0-alpha-2 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. hbase-2.0.0-alpha-2 includes all that was in alpha-1 (new assignment manager, offheap read/write path, in-memory compactions, etc.) plus a return to branch-1 deploy mode where master carries no regions (branch-2 and master up to this had master carrying system tables), a purge of all checked-in generated content, updates to all dependencies including a move to rely on new hbase-thirdparty lib for relocated versions of guava, netty, and protobuf, etc. The list of features addressed in 2.0.0 so far can be found here . There are about 2700+. The list of ~500 fixes in 2.0.0 exclusively can be found here . I've updated our overview doc. on the state of 2.0.0  but JIRA 2.0.0 label  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 let us know if there is anything you would have us change or anything you see missing by mailing d...@hbase.apache.org or by filing issues at https://issues.apache.org/jira/projects/HBASE/summary We are planning one more alpha release before we move to beta (alpha-3). Now is the time to catch the egregious and flag the incompatibilities while we have time to bend. Once we move to beta, APIs and feature-set will be fixed. Download through an ASF mirror near you: https://www.apache.org/dyn/closer.lua/hbase/2.0.0-alpha-2 Checksums can be found here: https://www.apache.org/dist/hbase/2.0.0-alpha-2/hbase-2.0. 0-alpha2-bin.tar.gz.md5 https://www.apache.org/dist/hbase/2.0.0-alpha-2/hbase-2.0. 0-alpha2-src.tar.gz.md5 Project member signature keys can be found at https://www.apache.org/dist/hbase/KEYS PGP signatures are here: https://www.apache.org/dist/hbase/2.0.0-alpha-2/hbase-2.0. 0-alpha2-src.tar.gz.asc https://www.apache.org/dist/hbase/2.0.0-alpha-2/hbase-2.0. 0-alpha2-bin.tar.gz.asc For instructions on verifying ASF release downloads, please see https://www.apache.org/dyn/closer.cgi#verify Question, comments, and problems are always welcome at: d...@hbase.apache.org. Yours, The HBase Dev Team 1. https://docs.google.com/document/d/1WCsVlnHjJeKUcl7wHwqb4 z9iEu_ktczrlKHK8N4SZzs/edit# 2. https://issues.apache.org/jira/projects/HBASE/versions/12327188 3.https://issues.apache.org/jira/browse/HBASE-18611?jql=proj ect%20%3D%20HBASE%20%20and%20(fixVersion%20%3D%202.0.0%20% 7C%7C%20fixVersion%20%3D%202.0.0.alpha1%20%7C%7C%20fixVersi on%20%3D%202.0.0-alpha-2)%20and%20fixVersion%20not%20in% 20(1.0.0%2C%201.0.1%2C%201.0.2%2C%201.0.3%2C%201.0.4%2C% 201.0.5%2C%201.0.6%2C%201.1.0%2C%201.1.1%2C%201.1.2%2C%201. 1.3%2C%201.1.4%2C%201.1.5%2C%201.1.6%2C%201.1.7%2C%201.1.8% 2C%201.1.9%2C%201.1.10%2C%201.2.0%2C%201.2.1%2C%201.2.2%2C% 201.2.3%2C%201.2.4%2C%201.2.5%2C%201.2.6%2C%201.3.0%2C%201. 3.1%2C%201.4.0)%20and%20%20(status%20%3D%20Open%20or% 20status%20%3D%20%22Patch%20Available%22) 4. https://issues.apache.org/jira/browse/HBASE-18599?jql=pro ject%20%3D%20HBASE%20%20and%20(%20fixVersion%20%3D%202.0. 0%20%7C%7C%20fixVersion%20%3D%202.0.0-alpha-1%20%7C%7C% 20fixVersion%20%3D%202.0.0-alpha-2)%20and%20(status%20%3D%20Resolved)