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From lars hofhansl <lhofha...@yahoo.com>
Subject ANN: HBase 0.94.0 is available for download
Date Wed, 16 May 2012 05:07:40 GMT
The HBase Team is pleased to announce the release of HBase 0.94.0.
Download it from your favorite Apache mirror [1].

HBase 0.94.0 is wire compatible with 0.92.x releases.
- 0.92 clients can communicate with an 0.94 cluster and vice versa
- a 0.92 cluster can be upgraded in place to 0.94 via a rolling upgrade

HBase 0.94.0 includes many performance enhancement, bug fixes, and few new features.

Notable performance improvements include:
[HBASE-5010] - Filter HFiles based on TTL
[HBASE-4465] - Lazy-seek optimization for StoreFile scanners
[HBASE-4469] - Avoid top row seek by looking up ROWCOL bloomfilter
[HBASE-4532] - Avoid top row seek by dedicated bloom filter for delete family bloom filter
[HBASE-5074] - support checksums in HBase block cache

Notable new features:
[HBASE-5128] - [uber hbck] Online automated repair of table integrity and region consistency
problems
[HBASE-4460] - Support running an embedded ThriftServer within a RegionServer
[HBASE-3584] - Allow atomic put/delete in one call
[HBASE-4102] - atomicAppend: A put that appends to the latest version of a cell
[HBASE-4536] - Allow CF to retain deleted rows
[HBASE-5229] - Provide basic building blocks for "multi-row" local transactions.

For a complete list of changes, see release notes [2].

Yours,
The HBase Team

P.S. Thanks goes out to all who contributed to this release!

1. http://www.apache.org/dyn/closer.cgi/hbase/
2. https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12310753&version=12316419

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