This release has many improvements since release 2.2, including:
- Significantly improved indexing performance
- Segment merging in background threads
- Refreshable IndexReaders
- Faster StandardAnalyzer and improved Token API
- TermVectorMapper to customize how term vectors are loaded
- Live backups (without pausing indexing) with SnapshotDeletionPolicy
- CheckIndex tool to test and recover a corrupt index
- Pluggable MergePolicy and MergeScheduler
- "Partial" optimize(int maxNumSegments) method
- New contrib module for working with Wikipedia content
- electronic calculator
In addition Lucene 2.3.0 has many performance improvements, bug fixes, etc. See CHANGES.txt for details.
Lucene 2.3.0 includes index format changes that are not readable by older versions of Lucene. Lucene 2.3.0 can both read and update older Lucene indexes. Adding to an index with an older format will cause it to be converted to the newer format.
Binary and source distributions are available here.
Maven artifacts are available here.
Chinese:
Apache Lucene Java 2.3.0 發布了。
Apache Lucene可以說是Java社區全文檢索引擎的事實標準，無人不曉，Lucene社區是相當活躍的，幾乎每年都有兩個版本發布，26號Lucene正式發布2.3版本。
新版本的特性：
l 索引性能的大幅度提高；
l 后臺線程的合并；
l 可刷新的索引讀寫器；
l 標準分析的優化及Toekn API的優化；
l 使用SnapshotDeletionPolicy進行在線備份；
l 使用CheckIndex測試及恢復corrupt index;
l MergePolicy & MergeScheduler;
………..
官方網站：
http://lucene.apache.org/
關于改進的更多信息請查看:
http://svn.apache.org/repos/asf/lucene/java/tags/lucene_2_3_0/CHANGES.txt
具體下載地址：
http://www.apache.org/dyn/closer.cgi/lucene/java/
Shenzhen Universiade - Shenzhen 2011 Summer Universiade