This subject was already discussed, this may help you : http://markmail.org/message/6dybhww56bxvufzf#query:+page:1+mid:6dybhww56bxvufzf+state:results
If you still got questions after reading this thread or some others about the same topic, do not hesitate asking again, Alain 2012/3/19 A J <s5a...@gmail.com> > How many Column Families are one too many for Cassandra ? > I created a db with 5000 CFs (I can go into the reasons later) but the > latency seems to be very erratic now. Not sure if it is because of the > number of CFs. > > Thanks. >