I would like to thank you all who participated in this! Thank you very much! Péter
2012/10/12 Robert Muir <rm...@apache.org>: > October 12 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 the Apache Lucene project. Its major features include powerful > full-text search, hit highlighting, faceted search, dynamic > 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 > searchand 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 > > See the CHANGES.txt file included with the release for a full list of details. > > Solr 4.0 Release Highlights: > > The largest set of features goes by the development code-name > "SolrCloud" 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 > only to the shard leaders > > 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 > 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) > > Note: The Apache Software Foundation uses an extensive mirroring > network for distributing releases. It is possible that the mirror you > are using may not have replicated the release yet. If that is the > case, please try another mirror. This also goes for Maven access. > > Happy searching, > > Apache Lucene/Solr Developers -- Péter Király eXtensible Catalog http://eXtensibleCatalog.org http://drupal.org/project/xc
