The idea to proxy access to Tarantool/Box is obvious, and a closed source proxy existed within Mail.Ru for a long time. Now that socket I/O is part of server-side Lua, proxying in Tarantool/Box is easier and more manageable than anywhere else. I published a draft spec for a proxy which job is to hide data sharding from the end user: There is no universal solution to the sharding problem, and when creating the spec, I tried to avoid the pitfall of making it a single-user solution. I hope, with your help, we’ll be able to avoid that.