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From Aditya <...@apache.org>
Subject Re: [ANNOUNCE] Apache HBase 1.0.0 is now available for download
Date Wed, 25 Feb 2015 22:59:45 GMT
A very important milestone indeed!

Congratulations to everyone who have been part of this wonderful community.

aditya...

On Wed, Feb 25, 2015 at 12:22 AM, Lars George <lars.george@gmail.com> wrote:

> Great work everyone! Congratulations, this is the most awesome community to
> be in.
>
> Some coverage:
> -
>
> https://blogs.apache.org/foundation/entry/the_apache_software_foundation_announces72
> -
>
> http://www.heise.de/developer/meldung/Big-Data-HBase-1-0-erschienen-2558708.html
>
>
> On Tue, Feb 24, 2015 at 9:30 AM, Enis Söztutar <enis@apache.org> wrote:
>
> > The HBase Team is pleased to announce the immediate release of HBase
> 1.0.0.
> > Download it from your favorite Apache mirror [1] or maven repository.
> >
> > HBase 1.0.0 is the next stable release, and the start of "semantic
> > versioned"
> > releases (See [2]).
> >
> > The 1.0.0 release has three goals:
> > 1) to lay a stable foundation for future 1.x releases;
> > 2) to stabilize running HBase cluster and its clients; and
> > 3) make versioning and compatibility dimensions explicit
> >
> > Including previous (developer preview) 0.99.x releases, 1.0.0 contains
> over
> > 1500
> > jiras resolved on top of 0.98.0. Some of the major changes are:
> >
> > API reorganization and changes
> >   HBase’s client level API has evolved over the years. To simplify the
> >   semantics and to support and make it extensible and easier to use in
> >   the future, we revisited the API before 1.0. To that end, 1.0.0
> > introduces
> >   new APIs, and deprecates some of the commonly-used client side APIs
> >   (HTableInterface, HTable and HBaseAdmin).
> >
> >   We advise to update your application to use the new style of APIs,
> since
> >   deprecated APIs will be removed in future releases (2.x). See [3] and
> [4]
> >   for an overview of changes.
> >
> >   All Client side API's are marked with InterfaceAudience.Public class,
> >   indicating that the class/method is an official "client API" for HBase
> >   (See “11.1.1. HBase API Surface” in the HBase Refguide[2] for more
> > details
> >   on the Audience annotations) Going forward, all 1.x releases are
> planned
> > to
> >   be API compatible for classes annotated as client public.
> >
> > Read availability using timeline consistent region replicas
> >   This release contains Phase 1 items for experimental "Read availability
> > using
> >   timeline consistent region replicas" feature. A region can be hosted in
> >   multiple region servers in read-only mode. One of the replicas for the
> > region
> >   will be primary, accepting writes, and other replicas will be sharing
> the
> > same
> >   data files. Read requests can be done against any replica for the
> region
> > with
> >   backup RPCs for high availability with timeline consistency guarantees.
> > More
> >   information can be found at HBASE-10070.
> >
> > Online config change and other forward ports from 0.89-fb branch
> >   HBASE-12147 forward ported online config change which enables some of
> the
> >   configuration from the server to be reloaded without restarting the
> > region
> >   servers.
> >
> > Master runs a Region Server as well
> >   Starting with 1.0.0, the HBase master server and backup master servers
> > will
> >   also act as a region server. RPC port and info port for web UI is
> shared
> > for
> >   the master and region server roles. Active master can host regions of
> >   defined tables if configured (disabled by default). Backup masters will
> > not
> >   host regions.
> >
> > Other notable improvements in 1.0.0 are listed (but not limited to)
> below:
> >  - A new web skin in time for 1.0 (http://hbase.apache.org)
> >  - [HBASE-5349]  - Automatic tuning of global memstore and block cache
> > sizes
> >  - Various security, tags and visibility labels improvements
> >  - Bucket cache improvements (usability and compressed data blocks)
> >  - [HBASE-11367] - A new pluggable replication endpoint to plug in to
> > HBase's
> >    inter-cluster replication to replicate to a custom data store
> >  - [HBASE-11885] - A Dockerfile to easily build and run HBase from source
> >  - [HBASE-8332]  - Truncate table command
> >  - [HBASE-11059] - Region assignment to use hbase:meta table instead of
> >    zookeeper for faster region assignment (disabled by default)
> >  - Extensive documentation improvements
> >  - [HBASE-12511] - namespace permissions - add support from table
> creation
> >    privilege in a namespace 'C'
> >  - [HBASE-12568] - Adopt Semantic Versioning and document it in the book
> >  - [HBASE-12640] - Add Thrift-over-HTTPS and doAs support for Thrift
> Server
> >  - [HBASE-12651] - Backport HBASE-12559 'Provide LoadBalancer with online
> >    configuration capability' to branch-1
> >  - [HBASE-10560] - Per cell TTLs
> >  - [HBASE-11997] - CopyTable with bulkload
> >  - [HBASE-11990] - Make setting the start and stop row for a specific
> > prefix
> >    easier
> >  - [HBASE-12220] - Add hedgedReads and hedgedReadWins metrics
> >  - [HBASE-12032] - Script to stop regionservers via RPC
> >  - [HBASE-11907] - Use the joni byte[] regex engine in place of j.u.regex
> > in
> >    RegexStringComparator
> >  - [HBASE-11796] - Add client support for atomic checkAndMutate
> >  - [HBASE-11804] - Raise default heap size if unspecified
> >  - [HBASE-12126] - Region server coprocessor endpoint
> >  - [HBASE-12075] - Preemptive Fast Fail
> >  - [HBASE-12363] - Improve how KEEP_DELETED_CELLS works with MIN_VERSIONS
> >  - [HBASE-12434] - Add a command to compact all the regions in a
> > regionserver
> >  - [HBASE-8707]  - Add LongComparator for filter
> >  - [HBASE-12286] - [shell] Add server/cluster online load of
> configuration
> >    changes
> >  - [HBASE-12361] - Show data locality of region in table page
> >  - [HBASE-12496] - A blockedRequestsCount metric
> >  - [HBASE-12730] - Backport HBASE-5162 (Basic client pushback mechanism)
> to
> >    branch-1
> >  - [HBASE-12731] - Heap occupancy based client pushback
> >  - [HBASE-12728] - buffered writes substantially less useful after
> removal
> > of
> >    HTablePool
> >  - [HBASE-5699] - Run with > 1 WAL in HRegionServer
> >  - Various fixes to REST server
> >  - Internal refactoring for abstracting away zookeeper usage
> >  - Better support for Cell interface internally in read and write paths
> for
> >    better performance and flexibility
> >  - Combining internal mvcc and seqId infrastructure
> >  - [HBASE-10156][HBASE-8755] - Ring buffer based WAL improvements
> >  - [HBASE-9117] - Switch to using new style of client APIs internally
> >  - Perf improvements
> >  - Numerous improvements in other areas and bug fixes.
> >
> > 1.0.0 release has these changes in default behavior (see [4])
> >  - [HBASE-12241] - Zookeeper 3.4.x is required
> >  - [HBASE-10781] - Hadoop-2.x is required
> >  - [HBASE-11666] - JDK-1.7 is required
> >  - Default ports have changed from 600XX range into out of ephemeral
> 160XX
> >    range.
> >  - Hfile version 3 has been enabled by default.
> >  - Slab cache has been removed (use bucket cache instead)
> >  - [HBASE-11804] - Default heap for region servers (and master) is
> changed
> > from
> >    1GB to the jdk's default. On most platforms, it will default to 1/4 of
> >    physical memory
> >  - [HBASE-10602] - Some client facing APIs (HTableInterface, etc) has
> been
> >    deprecated and replaced.
> >  - Custom Filter implementations should switch to using the new
> recommended
> >    APIs.
> >  - Some authorization permissions (especially regarding namespaces) have
> > been
> >    changed (HBASE-12511, HBASE-8015)
> >  - [HBASE-11178] - Mapred package and classes under there has been
> >    un-deprecated.
> >  - Two new modules (jar files): hbase-annotations and hbase-rest.
> >  - HTrace dependency is moved to the Apache artifacts [7]
> >  - Various updates to dependency versions
> >
> > Full list of the issues can be found at:
> >  - 1.0.0 issues  :
> >
> >
> https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12310753&version=12325852
> >  - 0.99.2 issues :
> >
> >
> https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12310753&version=12325675
> >  - 0.99.1 issues :
> >
> >
> https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12310753&version=12328551
> >  - 0.99.0 issues :
> >
> >
> https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12310753&version=12328822
> >
> >
> > Compatibility
> > -----------------
> > Source Compatibility:
> > Client side code in HBase-1.0.0 is (mostly) source compatible with
> earlier
> > versions. Some minor API changes might be needed from the client side.
> >
> > Wire Compatibility:
> > HBase-1.0.0 release is wire compatible with 0.98.x releases. Clients and
> > servers running in different versions as long as new features are not
> used
> > should be possible.
> > A rolling upgrade from 0.98.x clusters to 1.0.0 is supported as well.
> 1.0.0
> > introduces a new file format (hfile v3) that is enabled by default that
> > 0.96.x code cannot read. Thus, rolling upgrade from 0.96 directly to
> 1.0.0
> > is
> > not supported.
> > 1.0.0 is NOT wire compatible with earlier releases (0.94, etc).
> >
> > Binary Compatibility:
> > Binary compatibility at the Java API layer with earlier versions (0.98.x,
> > 0.96.x and 0.94.x) is NOT supported. You may have to recompile your
> client
> > code and any server side code (coprocessors, filters etc) referring to
> > hbase jars.
> >
> > Upgrading
> > --------------
> > See [5] for upgrade instructions and extended discussion on the changes.
> >
> > From 0.98.x : Upgrade from 0.98.x in regular upgrade or rolling upgrade
> > fashion
> > is supported.
> >
> > From 0.96.x : Upgrade from 0.96.x is supported with a shutdown and
> restart
> > of
> > the cluster.
> >
> > From 0.94.x : Upgrade from 0.94.x is supported similar to upgrade from
> > 0.94 -> 0.96. The upgrade script should be run to rewrite cluster level
> > metadata. See [6] for details.
> >
> >
> > Supported Hadoop versions
> > --------------------------------------
> > 1.0.0 release drops support for Hadoop-1.x releases. Only Hadoop-2.x
> > releases are supported. Hadoop-2.4.x, Hadoop-2.5.x and Hadoop-2.6.x
> > releases
> > are the most tested hadoop releases and we recommend running with those
> > or later versions. Earlier Hadoop-2 based releases, hadoop-2.2.x and
> 2.3.x
> > are not tested to the full extend. More information can be found at [8]
> >
> >
> > Supported Java versions
> > ----------------------------------
> > 1.0.0 release drops support for JDK6. Only JDK7 is supported. JDK8
> support
> > is experimental. More information can be found at [9].
> >
> > HBase-1.0.0 is marked as the current stable version, and we encourage all
> > users
> > to start using this version.
> >
> > Thanks to everybody who contributed to this release!
> >
> > Cheers,
> > The HBase Team
> >
> > 1. http://www.apache.org/dyn/closer.cgi/hbase/
> > 2. https://hbase.apache.org/book/upgrading.html#hbase.versioning
> > 3. http://www.slideshare.net/xefyr/apache-hbase-10-release
> > 4. http://s.apache.org/hbase-1.0-api
> > 5. https://hbase.apache.org/book/upgrade1.0.html#upgrade1.0.changes
> > 6. https://hbase.apache.org/book/upgrade1.0.html#upgrade1.0.from.0.94
> > 7. https://htrace.incubator.apache.org/
> > 8. https://hbase.apache.org/book/configuration.html#hadoop
> > 9. https://hbase.apache.org/book/configuration.html#java
> >
>

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