Lucene 和 Solr 4.8 發布

這次發布是Lucene要求JDK 7支持的第一個版本

以下是一些與 4.7.2版本相比的變化：

Lucene

• First version of Lucene requiring JDK 1.7
• New index format stores checksums for each file and can check them during merges
• HunspellStemFilter uses 10 to 100x less memory and can open OpenOffice dictionaries without errors
• Rescorer API was added to allow recalculating score for documents using more complicated functions
• NativeFSLockFactory bug was fixed that allowed multiple IndexWriter instances obtain a lock
• Multiple bug fixes and improvements since Lucene 4.7.2

Solr

• Expand component was introduced – it allows to expand collapsing and block-join relationships
• Added ADDREPLICA command to CollectionsAPI to allow easy replica creation
• Complex phrase queries were added to Solr
• <fields> and <types> tags in schema.xml are not mandatory anymore
• REST API was added for synonyms and stopwords
• Optimizations and bugfixes from Lucene 4.8

Lucene詳細變化列表請查看： http://wiki.apache.org/lucene-java/ReleaseNote48.
Solr 4.8 細變化列表請查看： http://wiki.apache.org/solr/ReleaseNote48.

Apache Lucene 4.8 下載地址: http://www.apache.org/dyn/closer.cgi/lucene/java/.
Apache Solr 4.8 c下載地址: http://www.apache.org/dyn/closer.cgi/lucene/solr/.