Adding Lucene news for release 9.0.0
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+Title: Apache Lucene™ 9.0.0 available
+category: core/news
+URL:
+save_as:
+
+The Lucene PMC is pleased to announce the release of Apache Lucene 9.0.0.
+
+Apache Lucene is a high-performance, full-featured search engine library written entirely in Java. It is a technology suitable for nearly any application that requires structured search, full-text search, faceting, nearest-neighbor search across high-dimensionality vectors, spell correction or query suggestions.
+
+This release contains numerous bug fixes, optimizations, and improvements, some of which are highlighted below. The release is available for immediate download at:
+
+ <https://lucene.apache.org/core/downloads.html>
+
+### Lucene 9.0.0 Release Highlights:
+
+#### System requirements
+
+ - Lucene 9.0 requires JDK 11 or newer
+
+#### New features
+
+ - Support for indexing high-dimensionality numeric vectors to perform nearest-neighbor search, using the Hierarchical Navigable Small World graph algorithm
+ - New Analyzers for Serbian, Nepali, and Tamil languages
+ - IME-friendly autosuggest for Japanese
+ - Snowball 2, adding Hindi, Indonesian, Nepali, Serbian, Tamil, and Yiddish stemmers
+ - New normalization/stemming for Swedish and Norwegian
+
+#### Optimizations
+
+ - Up to 400% faster taxonomy faceting
+ - 10-15% faster indexing of multi-dimensional points
+ - Several times faster sorting on fields that are indexed with points. This optimization used to be an opt-in in late 8.x releases and is now opt-out as of 9.0.
+ - ConcurrentMergeScheduler now assumes fast I/O, likely improving indexing speed in case where heuristics would incorrectly detect whether the system had modern I/O or not
+ - Encoding of postings lists changed from FOR-delta to PFOR-delta to save further disk space
+
+#### Other
+
+ - File formats have all been changed from big-endian order to little endian order
+ - Lucene 9 no longer has split packages. This required renaming some packages outside of the lucene-core JAR, so you will need to adjust some imports accordingly.
+ - Using Lucene 9 with the module system should be considered experimental. We expect to make progress on this in future 9.x releases.
+
+Please read CHANGES.txt for a full list of new features and changes:
+
+ <https://lucene.apache.org/core/9_0_0/changes/Changes.html>
