[OpenSIPS-Users] Use of Ratelimit Module as CPS limiter

[Will Baz]

Hi All,
I have been taking a look at the ratelimit module to limit CPS as suggested by a few prior posts. I believe I have the gist of it (it's a key/value store w/ specialized algorithms to calculate when a limit is reached), but I was wondering if someone could explain best practices for removing values from the key/value store?
Specifically I was planning on limiting CPS by entering a string for my key that represents the "second" and increment. So something like this: 

rl_check("080101", 5, <some algorithm>)

We could also add a trunk_id to the front of that string to limit CPS on a particular trunk or IP or whatever. Then when a call comes in at that specific second we increment the counter and check to see if there have already been 5 calls that second.

What I'm not clear on looking at the module description (http://www.opensips.org/html/docs/modules/devel/ratelimit.html) is how I could destroy certain key/value pairs once I don't need them anymore (because the second is over). I do not want to have 3600 values an hour sitting in memory.

Anyways, if someone has used ratelimit in a similar fashion or may understand it better than I, I'd appreciate any feedback.

Thanks!
Will

PS, Apologies if this is a duplicate. I originally posted w/o being a member of the lists. I joined and then reposted assuming my original would not be posted.
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