On May 8, 2008, at a sambaXP followup meeting that took place in Göttingen at SerNet, the idea was born to combine the best parts of Samba3 and Samba4 to form a complete Samba Active Directory server that is also a performant file server and a print server.
One essential part for the feasibility of that project is Volker Lendecke's recent work on Samba 3 on adding the ability to delegate named pipes (dcerpc services) to external programs over unix domain sockets.
The plumbing design
The basic Idea was that
Name of the game
The codename Franky was coined for the combined Samba release.