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The "ReleaseNote40" page has been changed by HossMan: http://wiki.apache.org/solr/ReleaseNote40?action=diff&rev1=1&rev2=2 Comment: merge beta & alpha highlights; add some newer stuff; add specific "since beta" subsection; fill {{{ - MMM??? 2012, Apache Solr™ 4.0 available - The Lucene PMC is pleased to announce the release of Apache Solr 4.0. + MMM??? 2012, Apache Solr™ 4.0 available The Lucene PMC is pleased to + announce the release of Apache Solr 4.0. - Solr is the popular, blazing fast, open source NoSQL search platform from + Solr is the popular, blazing fast, open source NoSQL search platform - the Apache Lucene project. Its major features include powerful full-text + from the Apache Lucene project. Its major features include powerful - search, hit highlighting, faceted search, dynamic clustering, database + full-text search, hit highlighting, faceted search, dynamic - integration, rich document (e.g., Word, PDF) handling, and geospatial search. - Solr is highly scalable, providing fault tolerant distributed search and indexing, - and powers the search and navigation features of many of the world's - largest internet sites. + clustering, database integration, rich document (e.g., Word, PDF) + handling, and geospatial search. Solr is highly scalable, providing + fault tolerant distributed search and indexing, and powers the search + and navigation features of many of the world's largest internet sites. Solr 4.0 is available for immediate download at: http://lucene.apache.org/solr/mirrors-solr-latest-redir.html @@ -19, +19 @@ See the CHANGES.txt file included with the release for a full list of details. - Highlights of changes since 4.0-beta: + Solr 4.0 Release Highlights: - * TODO + The largest set of features goes by the development code-name "Solr + Cloud" and involves bringing easy scalability to Solr. See + http://wiki.apache.org/solr/SolrCloud for more details. + * Distributed indexing designed from the ground up for near real-time + (NRT) and NoSQL features such as realtime-get, optimistic locking, + and durable updates. + * High availability with no single points of failure. + * Apache Zookeeper integration for distributed coordination and + cluster metadata and configuration storage. + * Immunity to split-brain issues due to Zookeeper's Paxos distributed + consensus protocols. + * Updates sent to any node in the cluster and are automatically + forwarded to the correct shard and replicated to multiple nodes for + redundancy. + * Queries sent to any node automatically perform a full distributed + search across the cluster with load balancing and fail-over. + * A collection management API. + * Smart SolrJ client (CloudSolrServer) that knows to send documents + directly to the shard leaders - Please report any feedback to the mailing lists (http://lucene.apache.org/solr/discussion.html) + Solr 4.0 includes more NoSQL features for those using Solr as a + primary data store: + * Update durability – A transaction log ensures that even uncommitted + documents are never lost. + * Real-time Get – The ability to quickly retrieve the latest version + of a document, without the need to commit or open a new searcher + * Versioning and Optimistic Locking – combined with real-time get, + this allows read-update-write functionality that ensures no + conflicting changes were made concurrently by other clients. + * Atomic updates - the ability to add, remove, change, and increment + fields of an existing document without having to send in the + complete document again. + + Many additional improvements include: + * New spatial field types with polygon support. + * Pivot Faceting – Multi-level or hierarchical faceting where the top + constraints for one field are found for each top constraint of a + different field. + * Pseudo-fields – The ability to alias fields, or to add metadata + along with returned documents, such as function query values and + results of spatial distance calculations. + * A spell checker implementation that can work directly from the main + index instead of creating a sidecar index. + * Pseudo-Join functionality – The ability to select a set of + documents based on their relationship to a second set of documents. + * Function query enhancements including conditional function queries + and relevancy functions. + * New update processors to facilitate modifying documents prior to + indexing. + * A brand new web admin interface, including support for SolrCloud + and improved error reporting + * Numerous bug fixes and optimizations. + + Noteworthy changes since 4.0-BETA: + * New spatial field types with polygon support. + * Various Admin UI improvements. + * SolrCloud related performance optimizations in writing the the + transaction log, PeerSync recovery, Leader election, and + ClusterState caching. + * Numerous bug fixes and optimizations. + + Please report any feedback to the mailing lists + (http://lucene.apache.org/solr/discussion.html) }}}
