Projects / Groonga


Groonga is a fast and accurate full text search engine based on an inverted index. Newly registered document instantly appears in search results, and updates are allowed without read locks. These characteristics result in superior performance for real-time applications. It is also a column-oriented database management system (DBMS). Compared with well-known row-oriented systems, such as MySQL and PostgreSQL, column-oriented systems are more suited for aggregate queries.

Operating Systems

RSS Recent releases

  •  31 Mar 2014 22:32

    Release Notes: This release resolves an issue with the size of the database increasing. This feature is backward compatible, but not forward compatible. You need to recreate the database for it. This release supports a weight vector column and adjuster option for the select command. Both of these are used for accomplishing personalized search.

    •  10 Feb 2014 22:50

      Release Notes: The Chinese tokenizer for Groonga is available as deb packages; you can just install it "sudo apt-get install groonga-tokenizer-friso". Specify "TokenFriso" to use the Chinese tokenizer.

      •  29 Jan 2014 23:31

        Release Notes: This release supports customizing lock timeout when building Groonga. In previous versions, the value of the lock time was hard-coded in the source code. The GRN_JA_SKIP_SAME_VALUE_PUT environment variable is enabled by default. This feature was regarded as experimental when it was introduced, but enough time has passed to enable it by default.

        •  29 Dec 2013 19:39

          Release Notes: This release supports geo_in_rectangle in the whole world. Previous release versions supported only east longitude in the north hemisphere. This release supports Fedora 20.

          •  30 Nov 2013 03:10

            Release Notes: In this release, Groonga supports an option to skip updating for the same value. This feature is enabled by setting GRN_JA_SKIP_SAME_VALUE_PUT=yes as an environment variable. If you install Groonga as deb or rpm packages, you can modify the default configuration file to enable it. It may avoid increasing the database size excessively. Note that this feature is experimental.


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