Enis: Do you think a new RC should be made due to HBASE-12237 ? Cheers
On Sun, Oct 12, 2014 at 1:53 AM, Enis Söztutar <[email protected]> wrote: > The first release candidate for the second release from branch-1, HBase > 0.99.1 RC0, is > available for download at https://people.apache.org/~enis/hbase-0.99.1RC0/ > > Maven artifacts are also available in the temporary repository > https://repository.apache.org/content/repositories/orgapachehbase-1043/ > > 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=1563ccf209d4352a40ddd229d8264d7bfee1904e > > NOTE IN GIGANTIC LETTERS THAT THIS IS A DEVELOPER RELEASE. > DO NOT USE THIS RELEASE IN PRODUCTION. > > HBase 0.99.1 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. > > 0.99.1 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. > > 0.99.1 builds on top of all the changes that is in the 0.99.0 release (an > overview can be found at [1]). 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. > > The work to clearly mark and differentiate client facing APIs, and > redefine > some of the client interfaces for improving semantics, easy of use and > maintainability has continued in 0.99.1 release. Remaining work can > be found in 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. > > 0.99.1 changes some of the behavior for master / region colocation that was > introduced in 0.99.0 (see [1]). Now, the backup masters can no longer host > any regions. And active master can host regions of defined tables if > configured. Otherwise, it will not show up the region server UI similar to > a 0.98 deployment. Though master and region server still shares the same > rpc > ports. Details can be found here (HBASE-12034 and HBASE-10569). > > Some other notable improvements in this release are > - [HBASE-11178] - Remove deprecation annotations from mapred namespace > - [HBASE-11920] - Add CP hooks for ReplicationEndPoint > - [HBASE-11997] - CopyTable with bulkload > - [HBASE-12059] - Create hbase-annotations module > - [HBASE-11990] - Make setting the start and stop row for a specific > prefix easier > - [HBASE-12220] - Add hedgedReads and hedgedReadWins metrics > - [HBASE-12090] - Bytes: more Unsafe, more Faster > - [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-11890] - HBase REST Client is hard coded to http protocol > - [HBASE-12126] - Region server coprocessor endpoint > - [HBASE-12183] - FuzzyRowFilter doesn't support reverse scans > - [HBASE-12197] - Move REST (create hbase-rest module) > - Continuation of the cell-based read / write pipeline work for > performance boost > - Various fixes to REST server > - Some more documentation improvements > - Numerous improvements in other areas and bug fixes. > > The release has these changes in default behaviour: > - 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 > - mapred package and classes under there has been un-deprecated. > - two new modules (jar files): hbase-annotations and hbase-rest > - Slab cache has been removed (use bucket cache instead) > - Some more client API cleanup. > > > 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=12328551 > > > 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 0.99.1 is supported as well. > 0.99.1 > 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.x 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.x releases drop 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.x releases drop 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 10/14/2014 11:59PM PDT. > This is a developer (beta) release, so we have a shorter vote time. > [] +1 Release the artifacts as 0.99.1 > [] -1 DO NOT release the artifacts as 0.99.1, because... > > Thanks for helping to get a stable release out! > > References > ---------- > [1] > > https://mail-archives.apache.org/mod_mbox/hbase-dev/201409.mbox/%3ccamuu0w9y_+afw6ww0ha_p8kbew35b3ncshbuqacfndzs8tc...@mail.gmail.com%3E > > Enis >
