Tarantool is an efficient NoSQL database and a Lua application server.

Key features of the Lua application server:
* 100% compatible drop-in replacement for Lua 5.1, based on LuaJIT 2.0.
Simply use #!/usr/bin/tarantool instead of #!/usr/bin/lua in your script.
* full support for Lua modules and a rich set of own modules, including
cooperative multitasking, non-blocking I/O, access to external databases,
etc.

Key features of the database:
* MsgPack data format and MsgPack based client-server protocol
* two data engines: 100% in-memory with optional persistence and a 2-level
disk-based B-tree, to use with large data sets
* multiple index types: HASH, TREE, BITSET
* asynchronous master-master replication
* authentication and access control
* the database is just a C extension to the app server and can be turned off

WWW: http://tarantool.org/