Vik, We have used pipelimit at a sampling interval of 1 second, and, on the basis of contact with reality, decided to shift to a 3-second sampling window. The major problem with the 1-second interval is not the CPU usage, but that it's not very useful. Such a sampling window is extremely responsive to fluctuations within a short time, and this manifests very well in SIPP testing. However, SIPP generates calls in an orderly and linear fashion. Real-world SIP traffic is highly bursty and volatile. The result is that a 1-second sampling window will not properly encapsulate the data so as to reliably enforce a CPS limit of X. For example, if you set a limit of 300 CPS, the short sampling window makes it quite possible to burst far beyond 300 CPS as long as it is done within < 50% of the duty cycle. 3 seconds is a more realistic compromise. In virtue of smoothing some peaks, it is less dynamic and responsive, but it far more accurately takes into account the bursty and chaotic nature of real-world high-volume call setups. These are not modeled well with SIPP testing. -- Alex -- Alex Balashov | Principal | Evariste Systems LLC 303 Perimeter Center North, Suite 300 Atlanta, GA 30346 United States Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

Not personally, but we sell a SIP platform built on top of Kamailio that is designed specifically for that purpose. -- Alex Balashov | Principal | Evariste Systems LLC 303 Perimeter Center North, Suite 300 Atlanta, GA 30346 United States Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ Sent from my BlackBerry. *From: *Vik Killa *Sent: *Thursday, January 7, 2016 14:01 *To: *Kamailio (SER) - Users Mailing List *Reply To: *Kamailio (SER) - Users Mailing List *Subject: *Re: [SR-Users] using pipelimit at CPS (1 second) Do you operate Kamilio in a wholesale environment with many CPS? On Thu, Jan 7, 2016 at 12:22 PM, Alex Balashov &lt;abalashov(a)evaristesys.com <mailto:abalashov@evaristesys.com>> wrote: Vik, We have used pipelimit at a sampling interval of 1 second, and, on the basis of contact with reality, decided to shift to a 3-second sampling window. The major problem with the 1-second interval is not the CPU usage, but that it's not very useful. Such a sampling window is extremely responsive to fluctuations within a short time, and this manifests very well in SIPP testing. However, SIPP generates calls in an orderly and linear fashion. Real-world SIP traffic is highly bursty and volatile. The result is that a 1-second sampling window will not properly encapsulate the data so as to reliably enforce a CPS limit of X. For example, if you set a limit of 300 CPS, the short sampling window makes it quite possible to burst far beyond 300 CPS as long as it is done within < 50% of the duty cycle. 3 seconds is a more realistic compromise. In virtue of smoothing some peaks, it is less dynamic and responsive, but it far more accurately takes into account the bursty and chaotic nature of real-world high-volume call setups. These are not modeled well with SIPP testing. -- Alex -- Alex Balashov | Principal | Evariste Systems LLC 303 Perimeter Center North, Suite 300 Atlanta, GA 30346 United States Tel: +1-800-250-5920 <tel:%2B1-800-250-5920> (toll-free) / +1-678-954-0671 <tel:%2B1-678-954-0671> (direct) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org <mailto:sr-users@lists.sip-router.org> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users