8 Best Open Source Searchengines built on top of Lucene
Lucene is most powerful and widely used Search engine. Here is the list of 7 search engines which is built on top of Lucene. You could imagine how powerful they are.
Solr is the popular, blazing fast open source enterprise search platform from the Apache Lucene project. Its major features include powerful full-text search, hit highlighting, faceted search, dynamic clustering, database integration, and rich document (e.g., Word, PDF) handling. Solr is highly scalable, providing distributed search and index replication, and it powers the search and navigation features of many of the world's largest internet sites. http://lucene.apache.org/solr/
ElasticSearch could be opted if, We want our search solution to be fast, we want a painless setup and a completely free search schema, we want to be able to index data simply using JSON over HTTP, we want our search server to be always available, we want to be able to start with one machine and scale to hundreds, we want real-time search, we want simple multi-tenancy, and we want a solution that is built for the cloud. http://www.elasticsearch.com
IndexTank search engine powers search in Reddit, Social bookmarking site. IndexTank is acquired by LinkedIn and released the project as open source. It includes features like Variables boosts, Facets, Faceted search, Snippeting, Custom scoring functions, Suggest, and Autocomplete. https://github.com/linkedin/indextank-engine
Katta is a scalable, failure tolerant, distributed, data storage for real time access. Katta serves large, replicated, indices as shards to serve high loads and very large data sets. These indices can be of different type. Currently implementations are available for Lucene and Hadoop mapfiles. http://katta.sourceforge.net/
Bobo Search Bobo Browse is an information retrieval technology that provides navigational browsing into a semi-structured dataset. Beyond the result set from queries and selections, Bobo Browse also provides the facets from this point of browsing. It provides support to sort documents on fields that have multiple values. It is stable and used by LinkedIn. https://github.com/javasoze/bobo
Compass provides real time searchengine built on top of Lucene. It is distributed, transcational, supports Spring MVC, integrates with ORM. Compass provides google-style search, index updates as well as more advanced concepts such as caching and index sharding (sub indexes). http://www.compass-project.org/
Summa is a fast modular and scalable search engine written in Java. It can simultaneously access a number of different data and data sources and expose it in a unified interface. It supports distributed architecture and fault tolerant. It can be scaled up or down to handle any amount of data. http://wiki.statsbiblioteket.dk/summa/
Constellio Open Source Enterprise Search is based on Apache Solr and using Google Search Appliances connectors architecture, it allows, with a single click, to find all relevant content in your organization (Web, email, ECM, CRM etc.). http://constellio.com/
Open source projects tagged Search engine
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Lucene is a search library built in Java. Solr is a web application built on top of Lucene. Certainly Solr = Lucene + Added features. Often there would a question, when to choose Solr and when to choose Lucene.
Most of the database has support of full text search, basically indexing and saarching. MySQL, Oracle and many more databases has in-built full text search. Then what is the need to go for external search engine like Lucene, Sphinx, Solr etc. Check out the advantage of using Searchengine.
Solr is a search engine built on top of Lucene. It supports REST interface and has lot of built-in capabilities. Solr package has Admin UI interface which has support to perform query and even delete the contents of the index. If you are using Solr in production then you may need to restrict access. I saw couple of questions in the group related to this topic. Thought to write an article explaining few tips to restrict the user access to Solr admin UI.
Lucene and Solr are most popular and widely used search engine. It indexes the content and delivers the search result faster. It has all capabilities of NoSQL database. This article describes about its pros and cons.
Lucidworks Enterprise search solution is built on top of Apache Solr. It scales seamlessly w/sub-second response times under extreme query loads for multi-billion document collections. It has user friendly UI, which does all the job of configuration and search.
The release 4.0 is one of the important milestone for Lucene and Solr. It has lot of new features and performance important. Few important ones are highliggted in this article.
Enterprise search software should be capable to search the data available in the entire organization or personnel desktop. The data could be in File system, Web or in Database. It should search contents of Emails, file formats like doc, xls, ppt, pdf and lot more. There are many commercial products available but LucidWorks and SearchBlox are best and free.
Solr and Elastic Search are built on top of Lucene. Both are open source and both have extra features which makes programmer life easy. This article explains the difference and the best situation to choose between them.
As open source getting popular day by day, many have questions like How to make money from Open Source? Lot more products are getting introduced and don't know who is making money. Certainly open source means, give the product and source for free then how to make money? Yes sell the product for free but get paid for its services.
Many startups are entering in to the business due to open source. Open source acts as a back bone / pillar for their business. It reduces the cost of production, Generates revenue from consulting and support. This article describes about the startups which flourished because of open source. Sun acquired MySQL for $1Bn is the biggest achievement for open source startups.