[Graphite-list] Aggregating sets

[Rafael A. <alm...@gm...>]

Hello,

Using statsd I can have a "unique_users" metric, which tells me how many
unique users were active in my website in a given time interval. However,
that data seems to be insufficient in order to aggregate the unique users
in a different time interval. For instance, if I have 10 unique users on
timeslice A and 7 unique users on timeslice B. The number of unique users
during the timeslice A+B is not 17. How do I solve that problem? I could
create a metric for each user, but that seems to be too slow (I tried with
7000 users and it was too slow, in my case it will be much more than that).

[]'s
Rafael