Roma is a decentralized distributed key-value store written in Ruby that is designed to be compatible with Memcached.
Key/Value
Custom API
N-ary Storage Model (Row/Record)
Shared-Nothing
http://roma-kvs.org/
https://github.com/roma/roma
https://roma-kvs.org/docs/about.html
Rakuten, Inc.
JP
2009
Commercial, Open Source
Ruby
Java, PHP, Python
Memcached