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From Apache Wiki <>
Subject [Lucene-java Wiki] Update of "ReleaseNote33" by MikeMcCandless
Date Wed, 22 Jun 2011 16:09:27 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Lucene-java Wiki" for change notification.

The "ReleaseNote33" page has been changed by MikeMcCandless:

  See the CHANGES.txt file included with the release for a full list of details.
- Lucene 3.3 Release Highlights
+ Lucene 3.3 Release Highlights:
+  * The spellchecker module now includes suggest/auto-complete functionality,
+    with three implementations: Jaspell, Ternary Trie, and Finite State.
-  * A TopDocs.merge API which facilitates merging results across different 
-    shards, as well as SearchGroup.merge and TopGroups.merge for distributed
-    grouping support.
-  * Suggest/Autocomplete functionality to the spellchecker module, 
-    with three implementations: Jaspell, Ternary Trie, and Finite State.
+  * Support for merging results from multiple shards, for both "normal"
+    search results (TopDocs.merge) as well as grouped results using the
+    grouping module (SearchGroup.merge, TopGroups.merge).
   * An optimized implementation of KStem, a less aggressive stemmer
     for English.
@@ -32, +32 @@

   * Improvements to MMapDirectory (now also the default implementation 
     returned by on 64-bit Linux).
-  * NRTManager API to simplify handling near-realtime search handling,
+  * NRTManager simplifies handling near-real-time search with multiple
-    allowing the app to control when indexing changes must be visible
-    to search requests.
+    search threads, allowing the application to control which indexing
+    changes must be visible to which search requests.
+  * TwoPhaseCommitTool facilitates performing a multi-resource
+    two-phased commit, including IndexWriter.
+  * The default merge policy, TieredMergePolicy, has a new method
+    (set/getReclaimDeletesWeight) to control how aggressively it
+    targets segments with deletions, and is now more aggressive than
+    before by default.
  Note: The Apache Software Foundation uses an extensive mirroring network for
  distributing releases.  It is possible that the mirror you are using may not

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