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From Elliott Clark <ecl...@apache.org>
Subject Re: [ANNOUNCE] Apache HBase 0.96.0 is now available for download
Date Mon, 21 Oct 2013 16:08:24 GMT
Nice job everyone.

On Sat, Oct 19, 2013 at 1:31 PM, Dave Wang <dsw@cloudera.com> wrote:
> 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/
>> 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-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.

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