Apache Solr 1.2 is the first release since graduating from the Apache Incubator. Solr is a high performance full-text search server based on Lucene, written in Java5, and easily extensible through plugins written in Java. Documents are added to a search collection via XML over HTTP. The collection is queried via HTTP to receive an XML response (or alternately JSON, Python or Ruby text formats). Major features include:

• A powerful data schema to define fields, types, and configure text analysis
• External configuration via xml
• Faceted search
• Hit highlighting
• Flexible advanced caching
• Index replication for high availability
• A web admin interface

Some of the new features in 1.2 include CSV/delimited-text data loading, time based autocommit, faster faceting, negative filters, a spell-check handler, sounds-like word filters, regex text filters, and more flexible plugins. Apache Solr 1.2 can be downloaded from http://www.apache.org/dyn/closer.cgi/lucene/solr/

Has anyone used Solr in production environments that can share their experience?

solr was developed in-house by some guys at cnet and is used on their product search. its worth having a look around the solrsite because they talk about the reason for creating it and how they use it at cnet.

Has anyone used Solr in production environments that can share their experience?

We are using Solr as a Information Retrieval component in three projects. The biggest installation has indexed 2.5 Mio Documents by now and is growing with 10-15k documents per day and simultaneous updates/deletes - no serious accidents yet. The integration of search into Java or PHP is pretty straight forward. We added also some new Methods for linguistic preprocessing and navigation through search results like similarity search, clustering etc. Imho Solr is a great Solution if you need an Apache Lucene core including architecture and infrastructure for big projects.

Hannes, Can you mail me at mksreddy at gmail? We are starting on a huge project based on Solr. I would like to speak to you on your experience working with Solr. Thanks, Kumar.

We use solr for more than a year now, we have an index database of 2 million documents nad grwing at around 5k a day. performance is awsome. We developed our own java client to do queries and consume results. it is really a well thought out piece of software, ready to scale, and very, very fast. Very pleased with solr, thanks guys.

Has anyone used Solr in production environments that can share their experience?

this is CNET.com search engine :), ..