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From Andrew Purtell <apurt...@apache.org>
Subject Re: Second release candidate for HBase 0.99.0 (RC1) is available. Please vote by 09/19/2014
Date Sat, 20 Sep 2014 01:28:07 GMT
+1

Checked file sums and signature
Unpacked tarball, looked at directory layout
Started up a minicluster in tree, did a quick ingest test, it succeeded


On Tue, Sep 16, 2014 at 1:52 PM, Enis Söztutar <enis@apache.org> wrote:
> I am very happy to say that the second HBase 0.99.0 release candidate (RC1)
> is
> available for download at https://people.apache.org/~enis/hbase-0.99.0RC1/
>
> Maven artifacts are also available in the temporary repository
> https://repository.apache.org/content/repositories/orgapachehbase-1039/
>
> Signed with my code signing key E964B5FF. Can be found here:
> https://people.apache.org/keys/committer/enis.asc
>
> Signed tag in the repository can be found here:
> https://git-wip-us.apache.org/repos/asf?p=hbase.git;a=tag;h=336a63b5f58bb1c4859e3c2b6a2f5c0d68a7d9e1
>
> NOTE IN GIGANTIC LETTERS THAT THIS IS A DEVELOPER RELEASE.
> DO NOT USE THIS RELEASE IN PRODUCTION.
>
> HBase 0.99.0 is a "developer preview" release, and an odd-numbered release
> as
> defined in  https://hbase.apache.org/book/upgrading.html#hbase.versioning.
> This release IS NOT intended for production use, and does not contain any
> backwards or forwards compatibility guarantees (even within minor versions
> 0.99.x). Please refrain from deploying this over important data.
>
> 0.99.0 release is provided from branch-1, which will be the basis for
> HBase-1.0
> release. A few 0.99.x releases are planned before 1.0. The reason for
> doing a developer preview release is to get more testing for the branch-1
> code
> that will be released soon as HBase-1.0.0. Thus, all contribution in terms
> of
> testing, benchmarking, checking API / source /wire compatibility, checking
> out
> documentation and further code contribution is highly appreciated. 1.0 will
> be
> the first series in the 1.x line of releases which are expected to keep
> compatibility with previous 1.x releases. Thus it is very important to
> check
> the client side and server side APIs for compatibility and maintainability
> concerns for future releases.
>
> 0.99.0 contains slightly more than 1K issues resolved with many
> improvements
> and bug fixes. The theme of (eventual) 1.0 release is to become a stable
> base
> for future 1.x series of releases. 1.0 release will aim to achieve at least
> the same level of stability of 0.98 releases without introducing too many
> new
> features.
>
> Some work has been under way to clearly mark and differentiate client
> facing
> APIs, and redefine some of the client interfaces for improving semantics,
> easy
> of use and maintainability. 0.99.0 contains some of the completed items,
> and
> the rest can be found HBASE-10602. Marking/remarking of interfaces with
> InterfaceAudience has also been going on, which will identify areas for
> compatibility (with clients, coprocessors and dependent projects like
> Phoenix)
> for future releases.
>
> Starting with 0.99.0, 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 and backup masters by
> default
> will NOT be hosting any regions unless configured otherwise. See
> HBASE-10569
> and HBASE-11604 for more details.
>
> 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.
>
> Other notable improvements in this release are
>  - Automatic tuning of global memstore and block cache sizes
>  - Various security, tags and visibility labels improvements
>  - Bucket cache improvements (usability and compressed data blocks)
>  - A new pluggable replication endpoint to plug in to HBase's inter-cluster
>    replication to replicate to a custom data store
>  - A Dockerfile to easily build and run HBase from source
>  - Internal refactoring for abstracting away zookeeper usage
>  - Truncate table command
>  - Region assignment to use hbase:meta table instead of zookeeper for faster
>    region assignment (disabled by default)
>  - Better support for Cell interface internally in read and write paths for
>    better performance and flexibility
>  - Combining internal mvcc and seqId infrastructure
>  - Extensive documentation improvements
>  - Numerous improvements in other areas and bug fixes.
>
> The release has these changes in default behaviour:
>  - hfile version 3 has been enabled by default
>  - Distributed log replay has been enabled by default
>  - Slab cache has been removed (use bucket cache instead)
>  - Some client facing APIs (HTableInterface, etc) has been deprecated and
>    replaced.
>
> We have also adopted an orca as the mascot for Apache HBase. See it at
> https://hbase.apache.org/
>
> Thanks for everybody who have contributed to this release. Full list of the
> issues
> can be found here:
> https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12310753&version=12325675
>
>
> Compatibility
> -------------
> 0.99.x series of releases are preview of upcoming 1.0 release. HBase-1.0 is
> planned to be wire compatible with 0.98.x and 0.96.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 0.99.0 is supported as well.
> 0.99.0
> introduces a new file format (hfile v3) that is enabled by default that
> 0.96.x code cannot read. Rolling upgrade from 0.96 directly to 0.99 is not
> tested.
>
> Direct migration from 0.94.x is also supported but it IS NOT tested. Before
> HBase-1.0 we expect to complete the test.
>
> 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.
>
> 0.99.0 release introduces new APIs, and deprecates some of commonly-used
> client side APIs (HTableInterface, etc). However, client side code is
> expected
> to be source compatible with earlier versions. However we advise to update
> your application to use the new style of APIs, since deprecated APIs might
> be removed in future releases (2.x).
>
>
> Supported Hadoop versions
> -------------------------
> 0.99.0 release drops support for Hadoop-1.x releases. Only Hadoop-2.x
> releases are supported. Hadoop-2.4.x and Hadoop-2.5.x releases are the
> most tested hadoop releases and we recommend running with those 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 here:
> https://hbase.apache.org/book/configuration.html#hadoop
>
>
> Supported Java versions
> -------------------------
> 0.99.0 release drops support for JDK6. Only JDK7 is supported. JDK8 support
> is experimental. More information can be found here:
> https://hbase.apache.org/book/configuration.html#java
>
>
> Voting
> ------
> Please try to test and vote on this release by 09/19/2014 11:59PM PDT.
> This is a developer (beta) release, so we have a shorter vote time.
>
> [] +1 Release the artifacts as 0.99.0
> [] -1 DO NOT release the artifacts as 0.99.0, because...
>
> Thanks for helping to get a stable release out!
>
> Enis



-- 
Best regards,

   - Andy

Problems worthy of attack prove their worth by hitting back. - Piet
Hein (via Tom White)

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