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Tarantool
Open-source NoSQL database management system and Lua application server
Tarantool is an in-memory computing platform with a flexible data schema, best used for creating high-performance applications. Two main parts of it are an in-memory database and a Lua application server. Tarantool maintains data in memory and ensures crash resistance with write-ahead logging and snapshotting.
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It includes a Lua interpreter and interactive console, but also accepts connections from programs in several other languages. Mail.Ru, one of the largest Internet companies in Russia, started the project in 2008 as part of the development of Moy Mir (My World) social network. In 2010 for a project head it hired a former technical lead from MySQL. Open-source contributors have been active especially in the area of external-language connectors for C, Golang, Perl, PHP, Python, Ruby, and node.js. Tarantool became part of the Mail.Ru backbone, used for dynamic content such as user sessions, unsent instant messages, task queues, and a caching layer for traditional relational databases such as MySQL or PostgreSQL. By 2014 Tarantool had also been adopted by the social network services Badoo and Odnoklassniki (the latter is affiliated with Mail.Ru since 2010). All data is maintained in memory (RAM), with data persistence ensured by write-ahead logging and snapshotting, and for those reasons some industry observers have compared Tarantool to Membase.
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