It will be cool to share code and ideas, and he is definitely an expert in this field, where I'm just a newbie. But... I see that Kyoto is taking the route to b

It will be cool to share code and ideas, and he is definitely an expert in this field, where I'm just a newbie. But... I see that Kyoto is taking the route to be GPLed selling BSD-alice licenses. This is incompatible with my vision of open source. So what I'll do is to provide a minimal, clean, possibly toy-sh btree implementation outside Redis as a stand alone github project. Put it into BSD. Wait for requests of collaboration and code. A BSD-licensed library not bound to Redis is my way to say: let's collaborate on this. If the author of Tokyo Cabinet will join the effort, well, we'll be very lucky as we have an expert on board. But I suspect that anyway we are going to take some good contribution anyway, as this is a project that can be useful for many.