But like all the other possible contenders I've found, so far. I am unable to compile this project out of the box. Hopefully the maintainers of this one will be commenting on my github issues.
At this point it I'm getting the feeling I will have to my own half-baked tsdb to answer only my immediate problem, instead of finding the magic do-it-all well written, documented and extensible tsdb in Erlang. (I'm 2 weeks into Erlang, so it will probably be very terrible).
I've tried (and opened various issues on): pulsedb: https://github.com/pulsedb/pulsedb litetsdb: https://github.com/dreyk/litetsdb etsdb: https://github.com/philipcristiano/etsdb