<html><head></head><body style="background-color: rgb(255, 255, 255); line-height: initial;"> <div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">Not personally, but we sell a SIP platform built on top of Kamailio that is designed specifically for that purpose.</div> <div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><br style="display:initial"></div> <div style="display:none"></div> <div style="font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">--<br>Alex Balashov | Principal | Evariste Systems LLC<br>303 Perimeter Center North, Suite 300<br>Atlanta, GA 30346<br>United States<br><br>Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct)<br>Web: http://www.evaristesys.com/, http://www.csrpswitch.com/<br><br>Sent from my BlackBerry.</div> <table width="100%" style="background-color:white;border-spacing:0px;"> <tbody><tr><td colspan="2" style="font-size: initial; text-align: initial; background-color: rgb(255, 255, 255);"> <div style="border-style: solid none none; border-top-color: rgb(181, 196, 223); border-top-width: 1pt; padding: 3pt 0in 0in; font-family: Tahoma, 'BB Alpha Sans', 'Slate Pro'; font-size: 10pt;"> <div><b>From: </b>Vik Killa</div><div><b>Sent: </b>Thursday, January 7, 2016 14:01</div><div><b>To: </b>Kamailio (SER) - Users Mailing List</div><div><b>Reply To: </b>Kamailio (SER) - Users Mailing List</div><div><b>Subject: </b>Re: [SR-Users] using pipelimit at CPS (1 second)</div></div></td></tr></tbody></table><div style="border-style: solid none none; border-top-color: rgb(186, 188, 209); border-top-width: 1pt; font-size: initial; text-align: initial; background-color: rgb(255, 255, 255);"></div><br><div id="_originalContent" style=""><div dir="ltr">Do you operate Kamilio in a wholesale environment with many CPS? </div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jan 7, 2016 at 12:22 PM, Alex Balashov <span dir="ltr"><<a href="mailto:abalashov@evaristesys.com" target="_blank">abalashov@evaristesys.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Vik,<br>
<br>
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.<br>
<br>
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.<br>
<br>
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.<br>
<br>
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.<br>
<br>
-- Alex<br>
<br>
<br>
-- <br>
Alex Balashov | Principal | Evariste Systems LLC<br>
303 Perimeter Center North, Suite 300<br>
Atlanta, GA 30346<br>
United States<br>
<br>
Tel: <a href="tel:%2B1-800-250-5920" value="+18002505920" target="_blank">+1-800-250-5920</a> (toll-free) / <a href="tel:%2B1-678-954-0671" value="+16789540671" target="_blank">+1-678-954-0671</a> (direct)<br>
Web: <a href="http://www.evaristesys.com/" rel="noreferrer" target="_blank">http://www.evaristesys.com/</a>, <a href="http://www.csrpswitch.com/" rel="noreferrer" target="_blank">http://www.csrpswitch.com/</a><br>
<br>
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</blockquote></div><br></div>
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