[Freeswitch-users] Network Card

Fri Aug 15 03:23:26 MSD 2014

Why is 1000 cps obscene? 
Denovo lab uses nokia stack and we get over 1k cps in a server that cost 2k.

Sent from my HTC

----- Reply message -----
From: "Anthony Minessale" <anthony.minessale at gmail.com>
To: "Freeswitch-users" <freeswitch-users at lists.freeswitch.org>
Subject: [Freeswitch-users] Network Card
Date: Thu, Aug 14, 2014 6:16 PM

We don't give advice on load related questions outside what you have already seen in this thread.
1000cps is obscene.  If you are actually getting paid for 1000cps you can surely afford to invest in hardware and professional help.
On Aug 14, 2014 3:01 PM, "Andre" <andretodd at verizon.net> wrote:
Just testing for now, no production traffic. Trying to find the breaking point.
 The reason for the questions are because I’m testing FS and after a certain point I am getting very high PDD, more than 6 seconds.  Per the CDR’s it takes about 6 seconds from start time in CDR Inbound to CDR outbound.
I have tried 1 to 10 profiles to see if that makes a difference but it doesn’t and 1 to 4 consoles running one profile each still no difference.
 Any idea why the CDR’s should show it would take 6 seconds to get from start of inbound to start of outbound?  

From: freeswitch-users-bounces at lists.freeswitch.org [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Ken Rice

Sent: Thursday, August 14, 2014 2:06 PM
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] Network Card

1000 CPS the NIC is not the bottle neck this is actually relatively small amount of TCP/UDP traffic for just the SIP message.

Now the RTP @ 1000 calls on the other hand assuming G711 at 20ms ptime. And assuming 1 leg calls originating from a dialer would generate 80megabits of RTP (at the IP layer even more on the wire), and approx 50K PPS. Assuming 2 leg’d calls bridging media 160megabit and 100K PPS of just RTP... 

But then we have to extrapolate peak concurrent from 1000 CPS... Assuming dialer traffic again, 75% ASR and 20 second ACD, and lets assume the 25% are just hard failed for the calculation (no early media on these) that gives us 750 new calls/sec and over the course of 20 seconds we accumulate 15,000 concurrent calls..

So lets take that and extrapolate bandwidth and PPS requirements for single leg’d calls of 1.43Gig/sec (on the wire) and 750K PPS so that’s going to exceed the bandwidth of a GIG-E connection so you’d have to break this into 2 RTP endpoints in sofia, and make sure you switches/routers could handle the PPS loads. 

Double that to 2 leg calls and you have 2.86G/sec of RTP (again on the wire including UDP, IP, ethernet framing over heads) and pushing 1.5million PPS.

Here again this dictates at least 3 gig-e NICs on your FS box. Is this possible? I’m sure it is with the right hardware configuration... But lets step back a minute and really consider what is going on...

You are now putting approx over $2000/hr of traffic on a very expensive box that can and will at some point fail. Why are you doing such a thing? You’re better off limiting rates to sub 1000 CPS, (say 500CPS) deploying 3 boxes to handle the load in n+1 configuration, and if you lose a box you arent losing $2000+ in revenue and cranky customers while you repair/replace the now dead machine.

Lets face it, you can purchase a colo a nice machine for say 200 to 300$/month (assuming bandwidth costs are the same as above so that’s a wash instead of trying to cram it all on box that ends up costing you 1000/month by the time you pay for the hardware and colocation expenses for it.

On 8/14/14 11:56 AM, "Russell Treleaven" <rtreleaven at bunnykick.ca> wrote:
1000 calls per second... no idea but I really doubt the network interface is going to be the bottleneck.
Not sure why you make a distinction here between sessions  and connected.

To be clear you mean 5000 bridge calls correct?
Since media is not an issue I think you can just start testing with sipp and bwm-ng to see what is what.

1000 calls per second is a very big number.

Let us know how you make out.

Sincerely,

Russell Treleaven

On Wed, Aug 13, 2014 at 5:40 PM, Andre <andretodd at verizon.net> wrote:
1000 calls per second and 10000 sessions with 4000 connected. What would be recommend?

From: freeswitch-users-bounces at lists.freeswitch.org [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Russell Treleaven

Sent: Wednesday, August 13, 2014 5:25 PM
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] Network Card

If the media is bypassing you then you only need bandwidth for the signalling.

Depends primarily on the calls per second.

bwm-ng will help you to see whats going on.

On Wed, Aug 13, 2014 at 5:20 PM, Andre <andretodd at verizon.net> wrote:
 Hi, is there anything special with the network card to get 10,000 sessions in media bypass mode with FreeSwitch?  Will a Gig E be enough bandwidth?

What would it look like if the network card couldn’t keep up and how can I verify the network card is the bottleneck?
Thanks
Andre 

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