Congratulations everyone! - Dave
On Saturday, October 19, 2013, Stack wrote: > hbase-0.96.0 is now available for download [0]. > > Apache HBase is a scalable, distributed data store that runs atop Apache > Hadoop. > > The hbase-0.96.0 release has been more than a year in the making and > supplants our long-running 0.94.x series of releases. We encourage users > upgrade. > > More than 2k issues [1][2][3][4] are attributed to this version (counting > fixes done against this and the preview 0.95.x developer series of > releases). [7] is the total list of 0.96.0 changes. 1500+ of these changes > are in 0.96.0 alone; i.e. they have not been backported. At the end of > this note is a sampling of some notable fixes. > > High-level, the big themes driving this release have been improved > stability, operability, scaling fixes, and making it so we are in a > situation where we are free to evolve going forward while all the time > maintaining forward and backward compatibility. A bunch of work has been > done to improve Mean Time To Recovery on server and node crash. Everywhere > HBase persists has been moved to protobufs [8] including what we write > across the wire RPC'ing. We have a new balancer, call tracing, namespaces, > revamped metrics, hardened replication and assignment, client-side types > and mountains more of new utility and improvements. > > hbase-0.96.0 comes in two flavors; a build that includes and runs on > hadoop-1.x > and another for hadoop-2.x. You must chose the hbase that suits your > hadoopcontext. You will need to restart your cluster on deploy. On > restart, > HBase will run a few migration tasks that will complete in seconds, and off > you go again. hbase-0.94.x clients will not be able to talk to a 0.96.x > cluster. See '3. Upgrading' [5] section in the reference guide for notes on > upgrading and section '3.2. Upgrading from 0.94.x to 0.96.x' [6] in > particular. Downstream projects should notice very minor -- if any -- > changes in API. > > Thanks to legion who contributed to this release. > > At your service, > The HBase dev team > > This release is dedicated to Shaneal Manek, HBase contributor. > > 0. http://www.apache.org/dyn/closer.cgi/hbase/ > 1. 0.96.0 http://goo.gl/yp74gU > 2. 0.95.2 340 issues http://goo.gl/4djjE9 > 3. 0.95.1 265 issues http://goo.gl/TcdckW > 4. 0.95.0 1263 issues http://goo.gl/Iqcx2i > 5. http://hbase.apache.org/book.html#upgrading > 6. http://hbase.apache.org/book.html#upgrade0.96 > 7. http://goo.gl/NKoDqp > 8. https://code.google.com/p/protobuf/ > > > SAMPLE FROM RELEASE NOTES > > HBASE-7331 HBASE-6096 Add access control for region open and close, row > locking, and stopping the regionserver > HBASE-7678 HBASE-7667 make storefile management pluggable, together with > compaction > HBASE-8015 Support for Namespaces > HBASE-5335 Dynamic Schema Configurations > HBASE-5939 Add an autorestart option in the start scripts > HBASE-2214 Do HBASE-1996 -- setting size to return in scan rather than > count of rows -- properly > HBASE-9505 Enable replication by default > HBASE-8766 HBASE-6814 [WINDOWS] bin/hbase.cmd zkcli is broken > HBASE-4657 Improve the efficiency of our MR jobs with a few configurations > HBASE-6659 Port HBASE-6508 Filter out edits at log split time > HBASE-6055 Offline Snapshots in HBase 0.96 > HBASE-7567 [replication] Create an interface for replication peers > HBASE-5305 Improve cross-version compatibility & upgradeability > HBASE-9152 Not able to find HMaster and HRegionServer processes with grep > by process name on ps result because of large classpath as argument. > HBASE-8778 Region assigments scan table directory making them slow for huge > tables > HBASE-7721 Atomic multi-row mutations in META > HBASE-7007 [MTTR] Study assigns to see if we can make them faster still > HBASE-7845 optimize hfile index key > HBASE-7533 HBASE-7898 Write an RPC Specification for 0.96 > HBASE-6553 Remove Avro Gateway > HBASE-8505 References to split daughters should not be deleted separately > from parent META entry > HBASE-50 Snapshot of table > HBASE-8214 Remove proxy and engine, rely directly on pb generated Service > HBASE-5844 Delete the region servers znode after a regions server crash > HBASE-7315 HBASE-7263 Remove support for client-side RowLocks > HBASE-6135 Style the Web UI to use Twitter's Bootstrap. > HBASE-4676 Prefix Compression - Trie data block encoding > HBASE-6295 Possible performance improvement in client batch operations: > presplit and send in background > HBASE-4403 Adopt interface stability/audience classifications from Hadoop > HBASE-7008 Set scanner caching to a better default, disable Nagles > HBASE-7942 HBASE-4755 Make use of the plumbing in HBASE-7932 to provide > location hints when region files are created > HBASE-7835 HBASE-7006 Implementation of the log splitting without creating > intermediate files > HBASE-8334 Enable essential column family support by default > HBASE-6849 Make StochasticLoadBalancer the default > HBASE-6066 HBASE-6922 some low hanging read path improvement ideas > HBASE-5074 support checksums in HBase block cache > HBASE-7351 Periodic health check chore > HBASE-5887 Make TestAcidGuarantees usable for system testing. > HBASE-6783 Make read short circuit the default > HBASE-9529 HBASE-9495 Audit of hbase-client @InterfaceAudience.Public apis > HBASE-6435 Reading WAL files after a recovery leads to time lost in > HDFStimeouts when using dead > datanodes > HBASE-6206 HBASE-6182 Large tests fail with jdk1.7 > HBASE-9208 ReplicationLogCleaner slow at large scale > HBASE-5533 Add more metrics to HBase > HBASE-7306 HBASE-781 [shell] Count shell command to return ruby > bindablevalue. > HBASE-7110 refactor the compaction selection and config code similarly to > 0.89-fb changes > HBASE-7603 HBASE-7519 refactor storefile management in HStore in order to > support things like LevelDB-style compactions > HBASE-8693 HBASE-8089 DataType: provide extensible type API > HBASE-7932 HBASE-4755 Do the necessary plumbing for the region locations in > META table and send the info to the RegionServers > HBASE-6241 HBASE-6201 HBaseCluster interface for interacting with the > cluster from system tests > HBASE-8219 Align Offline Merge with Online Merge > HBASE-9523 HBASE-9495 Audit of hbase-common @InterfaceAudience.Public apis. > HBASE-8813 Fix time b/w recoverLease invocations from HBASE 8449 > HBASE-7290 Online snapshots > HBASE-8450 Update hbase-default.xml and general recommendations to better > suit current hw, h2, experience, etc. > HBASE-8201 HBASE-8089 OrderedBytes: an ordered encoding strategy > HBASE-8877 Reentrant row locks > HBASE-4393 Implement a canary monitoring program > HBASE-4050 Update HBase metrics framework to metrics2 framework > HBASE-4391 Add ability to start RS as root and call mlockall > HBASE-5924 In the client code, don't wait for all the requests to be > executed before resubmitting a request in error. > HBASE-7305 ZK based Read/Write locks for table operations > HBASE-5705 HBASE-5305 Introduce Protocol Buffer RPC engine > HBASE-5838 Add an LZ4 compression option to HFile > HBASE-7404 Bucket Cache:A solution about CMS,Heap Fragment and Big Cache on > HBASE > HBASE-7590 Add a costless notifications mechanism from master to > regionservers & clients > HBASE-9203 Secondary index support through coprocessors > HBASE-9121 Update HTrace to 2.00 and add new example usage. >
