Sphinx is a standalone search engine designed to provide full-text retrieval over information stored in databases and other document sources. It is particularly associated with applications that maintain their primary data in relational databases but require more sophisticated or efficient search capabilities.
The engine builds indexes that can be queried independently of the underlying database. Applications can submit searches to the Sphinx daemon, allowing the engine to perform text matching, relevance ranking and filtering without requiring the database server to execute every search directly.
Sphinx provides several ways for client applications to communicate with its search service. These include a native search API and SphinxQL, a SQL-like query language available through a MySQL-compatible network interface.
The engine supports conventional batch indexes as well as real-time indexing. It can also perform searches across distributed indexes, allowing different portions of a document collection to be searched by separate machines.
Its query functionality includes phrase matching, Boolean expressions, word proximity and filtering by document attributes.
This is free and open source software.
Key Features
- Full-text indexing of documents and SQL-backed data.
- Batch and real-time indexes for different data update requirements.
- Search daemon providing access to indexed document collections.
- SphinxQL query interface using a MySQL-compatible network protocol.
- Native search API for client applications.
- Boolean, phrase, proximity and keyword searches.
- Relevance ranking using BM25 and additional ranking factors.
- Filtering and sorting using document attributes.
- Distributed indexes for searching across multiple servers.
- Support for MySQL, PostgreSQL and other SQL data sources.
- Indexing of XML-based document sources.
- Text processing with stemming, stop words and word-form dictionaries.
- Support for UTF-8 and configurable tokenisation.
- User-defined functions for extending query processing.
Website: sphinxsearch.com
Support:
Developer: Sphinx Technologies Inc
License: GNU General Public License v2.0
Sphinx is written in C++. Learn C++ with our recommended free books and free tutorials.
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| MeiliSearch | Easy to use and deploy search engine |
| OpenSearch | Enterprise-grade search and observability suite |
| Sphinx | Search engine designed with indexing database content in mind |
| Xapian | Probabilistic information retrieval library |
| Typesense | Fast, typo-tolerant search engine |
| Manticore Search | Easy to use fast database for search |
| RediSearch | Query and indexing engine for Redis |
| ParadeDB | PostgreSQL extension adding search and analytical capabilities to Postgres |
| Vespa | AI search platform |
| Mroonga | MySQL storage engine based on the Groonga search engine |
| PGroonga | Adds a Groonga-powered index access method |
| Groonga | Fulltext search engine and column store |
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