cassandra : A highly scalable second-generation distributed database ( http://cassandra.apache.org/ )
cockroach : open source database for building cloud services ( https://www.cockroachlabs.com )
rocksdb : A Persistent Key-Value Store for Flash and RAM Storage ( http://rocksdb.org/ )
sqlitebrowser : SQLite Database Browser ( http://sqlitebrowser.org )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a cynede
For Paludis use this rsync : rsync://gentoo.zugaina.org/cynede-portage
If you have a problem : ycarus(-at-)zugaina.org