I understood the need for a time-series server when I was developing a real-time DAU metric server. There's a cool hack http://blog.getspool.com/2011/11/29/fa

I understood the need for a time-series server when I was developing a real-time DAU metric server. There's a cool hack http://blog.getspool.com/2011/11/29/fast-easy-realtime-metrics-using-redis-bitmaps/ http://blog.getspool.com/2011/11/29/fast-easy-realtime-metri... But not as cool as a time series db.