HBase 0.21 Roadmap
Current 0.21 Roadmap
- HBase 0.21 will run on Hadoop 0.20 and Hadoop 0.21.
- Pile in to help get HDFS performance and hbase-needed features committed: HDFS-895, etc. What else?
Original (Stale)0.21 Roadmap
Here is the old HBase 0.21 list, made for the timeframe of approximately August-September of 2009. It was drafted at Hackathon2 at StumbleUpon in 08/2009. Its since obsoleted by the above, moved aside on 04/17/2010.
Some of the below had detail added later: HBase Hackathon 2 Wrap-Up: Day One.
- Data integrity
Insure that proper append() support in HDFS actually closes the WAL last block write hole Still not done in 04/2010 but should be a version in 0.20.5 -- Stack
HBase-FSCK HBASE-7 -- Suggest making this a blocker for 0.21. Still not done in 04/2010 -- Stack
Host HTD and HCD in ZK with copies in META only for cold boot scenarios HBASE-1730
- Region assignment via ZK primitives
- HRS load state sharing
Replication HBASE-1295 Version in test now -- Stack
New RPC (Avro? Thrift?) HBASE-794 -- for speed improvements and to get away from having to manually set 'handlers'. Still not done in 04/2010, Avro doesn't yet have an RPC we'd want to move to (better serialization is nice an' all but its the transport we're interested in...) -- Stack
C/C++ client API HBASE-1015 Still not done in 04/2010, and desire has slipped -- Stack
New UI webapp -- Currently if master transistion, UI transitions with master. If 5 masters, where's my UI after master failover? Still not done in 04/2010 -- Stack
Uploader that writes the filesystem rather than the HBase API HBASE-48 -- Is whats there sufficient? Done for single-family case -- Stack
Distributed log splitting HBASE-1364 Still not done in 04/2010 -- Stack
Pool of commit loggers in each HRegionServer HBASE-1416 Still not done in 04/2010 and of less import -- Stack
Refactor HRS HBASE-1406 Still not done in 04/2010 -- Stack
Intra-row scanning HBASE-1537 Done -- Stack
Bloom filters revisit HBASE-1200 Still not done in 04/2010, currently under active dev -- Stack
Update thrift IDL to match new, rich hbase API HBASE-1744 Still not done in 04/2010, currently under active dev -- Stack