What a milestone! Congratulations to the HBase developer community and everyone who worked to make this happen. HBase has come a long way over the years.
On Tue, Feb 24, 2015 at 12:28 AM, Enis Söztutar <e...@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 >
