The document outlines the state of various HBase release branches, highlighting frequent bug fixes and stability in version 0.94, and major themes of security and performance improvements in versions 0.98 and 1.0. It details the anticipated end-of-life transitions and the planned release schedule for upcoming versions, with an emphasis on user upgrade paths. Overall, the document provides insights into the evolution of HBase and its major releases.

1. State of HBase
Invasion of the Release Managers

2. Release Managers
• 0.94 Lars Hofhansl
• 0.96 Michael Stack
• 0.98 Andrew Purtell
• 1.0 Enis Söztutar

3. Outline
• State of each branch
• Q&A

4. 0.94 Attributes
• Frequent bug fix releases (monthly)
• Still sees minor features
• Support for Hadoop 1, 2.0.x, Java 6 and 7
• Old (0.92) DNA, no protobufs, old AM

5. 0.94 State
• Current release 0.94.19
• Will have a few more releases
• Many large production installs out there
• Super stable and battle hardened
• EOL? Downtime for upgrade to 0.96+

6. • The “Singularity”
o Released 10/19/2013
o 18 months in the making
o 2k issues fixed/1500 in 0.96 only
• Big Themes
o Stability
o Operability
o Scaling
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Attributes

7. • Currently 0.96.2
• Maybe 0.96.3, but EOL’ing => 0.98.x!
• In CDH 5.0.x (0.96.1.1)/HDP 2.0.x
State

8. 0.98 Attributes
• Major themes
o Security
o Evolution
o Performance improvements
o API cleanups/deprecations on the road to HBase 1.0
• Monthly release schedule
• Support for Hadoop 1 and 2, but focus is on
Hadoop 2; Java 6 and 7

9. 0.98 State
• Current release 0.98.2
• Field testing for 1.0
o Expect incremental additive feature evolution
o HFile V3 and dependent features experimental until
1.0
• Seamless upgrade from 0.96
• CDH 5.1.x (not out yet)/HDP 2.1.x

10. 1.0 Attributes
• Stability of 0.96 / 0.98 line
• API cleanup
o Table / Connection
o Annotation of what is public
o Replication / Coprocessor APIs
• Semantic improvements
o Security / ACLs
o SeqId

11. 1.0 Attributes
• Masters become region servers
o (Optional) only system tables are hosted in active
master
• Cell level ACL / HFile v3 completion
• Dist log replay enabled by default
• Perf improvements

12. 1.0 State
• Planned a couple of 0.99.x releases
o A developer releases which won’t be supported
o Summer timeframe
o 0.99.x will become 1.0.0
• Use semantic versioning afterwards
o Major, minor, and patch releases
o More frequent major releases

13. Q&A