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Open Source SQL Full Text Search Engine - Sphinx

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I came across MySQL Performance Blog (which has some entries you might want to check out). It is an Open Source Full Text SQL Search Engine. It can be installed as a storage engine type on MySQL, and from what I hear can beat the pants off of MySQL's built-in full text search in some cases. From the web site:

Generally, it's a standalone search engine, meant to provide fast, size-efficient and relevant fulltext search functions to other applications. Sphinx was specially designed to integrate well with SQL databases and scripting languages. Currently built-in data sources support fetching data either via direct connection to MySQL, or from an XML pipe.
Here are some of the features:
  • high indexing speed (upto 10 MB/sec on modern CPUs)
  • high search speed (avg query is under 0.1 sec on 2-4 GB text collections)
  • high scalability (upto 100 GB of text, upto 100 M documents on a single CPU)
  • supports distributed searching (since v.0.9.6)
  • supports MySQL natively (MyISAM and InnoDB tables are both supported)
  • supports phrase searching
  • supports phrase proximity ranking, providing good relevance
  • supports English and Russian stemming
  • supports any number of document fields (weights can be changed on the fly)
  • supports document groups
  • supports stopwords
  • supports different search modes ("match all", "match phrase" and "match any")
  • generic XML interface which grealy simplifies custom integration
  • Related Entries

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