* The library works within a fixed amount of memory. No garbage collector. Small metadata, near perfect memory utilization (overhead is 5-7% of the total memory). * Besides memory management, Cachelot ensures smooth responsiveness, without any "gaps" for both read and write operations. * Cachelot can work as a consistent cache, returning an error when out of memory or evicting old items to free space for new ones. * The code is written in C++ and it is highly optimized. You can use cachelot on platforms with limited resources, like IoT devices or handheld.

* 100% compatible drop-in replacement for Lua 5.1, based on LuaJIT 2.1. 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 * 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, RTREE, 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