I'm Googling and finding a few things called "RODB" that don't quite match your descriptions. What in particular is it? Or are you talking about just rolling y

I'm Googling and finding a few things called "RODB" that don't quite match your descriptions. What in particular is it? Or are you talking about just rolling your own format to dump your data into? I've done that, but I'd still appreciate if I could use something that someone else had put the thought into. (Something like "cdb" by Daniel J. Bernstein, but that's an old 32-bit library that's limited to 4 GB files.)