Re: [asterisk-users] Capacity of single instance of Asterisk
Hi, Appreciate everyone for your valuable inputs. All these inputs provided by you are really useful. Thanks Regards, Amit Patkar -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Capacity of single instance of Asterisk
Hi Steve Thanks for your input. Please check my comments. I have a server with 24 cores running at 2.4ghz and 16 GB RAM. How many concurrent SIP sessions I can run from single instance of Asterisk on this server? I wish to use G711 codec with echo cancel. And all calls needs to be recorded. What kind of capacity are you looking to achieve? [Amit Patkar] Some where 2400 G.711 sessions with recording. So approx 1200 calls. From my experience, Asterisk is not really much of a RAM hog. A couple GB is good for a couple hundred simultaneous calls. With 4 'Intel(R) Xeon(TM) CPU 3.40GHz' cores, I can handle a couple hundred simultaneous non-transcoding calls with no recording on Asterisk 1.2. With 24 cores and 16 GB on tap, you will probably find other resource limitations before either CPU or RAM are a limiting factor. Personally, I'm a 'don't put all your eggs in one basket' kind of guy. Assuming a simplistic linear relationship between my host and yours, what will you do when it crashes with 1600 calls in progress? What will you do when you need to install patches or upgrade or ... I like a couple of instances of OpenSIPS in front of several Asterisk instances, even if OpenSIPS is on the same boxes as Asterisk. [Amit Patkar] I completely agree with you on distributing the load. At the same time, I am looking at juicing hardware as well. Can you share the number instead of saying couple hundreds? What will be impact on no of session when G729a is used? Significant. [Amit Patkar] Can I assume 30% reduction? Or it would be much more. -- Thanks in advance, - Steve Edwards sedwa...@sedwards.com Voice: +1-760-468-3867 PST Newline Fax: +1-760-731-3000 -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Capacity of single instance of Asterisk
Hi Kevin, Thank for your views. Where as no one is ready to share real numbers. I am looking at benchmarks so that I can plan for resources. Since asterisk project is active for so many years, I was expecting some published numbers. Thanks Regards, Amit Patkar On 03/12/2012 03:38 PM, Steve Edwards wrote: On Mon, 12 Mar 2012, Amit Patkar wrote: What will be impact on no of session when G729a is used? Assuming that transcoding is involved; if all the system is doing is passing through G.729A media streams, and recording them in unmixed G.729A format, there's no additional impact (the system might actually perform slightly better, as there is substantially less data being shuffled around). -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies Jabber: kflem...@digium.com | SIP: kpflem...@digium.com | Skype: kpfleming 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA Check us out at www.digium.com www.asterisk.org -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Capacity of single instance of Asterisk
On 03/13/2012 09:43 AM, Amit Patkar | Avhan Technologies Pvt Ltd wrote: Thank for your views. Where as no one is ready to share real numbers. I am looking at benchmarks so that I can plan for resources. Since asterisk project is active for so many years, I was expecting some published numbers. You have completely missed the point that other posters have made already on this list. Let me try to express it another way. Let's say that you were browsing at an engine manufacturer's website, looking at V-8 gasoline engines, and you found one that you liked, that you felt had a good combination of features for your project. If you then contacted the manufacturer and asked them 'how fast can this engine make a car travel', what do you think their response would be? Asterisk is a toolkit; it can be configured an infinite number of ways. Any performance measurements that are made and published apply *only* to the specific configuration that was measured; it may or may not be possible to extrapolate those into other configurations, or higher/lower capacities. There are lots of published numbers of Asterisk being used in various ways and for different purposes; whether any of them apply to your specific project is debatable, and relying on them for your project would carry some level of risk. Whether you are willing to accept that risk or not is up to you. In your specific case, as has been mentioned already, it is extremely unlikely that your proposed hardware would have any trouble with Asterisk 1.8 handling 2,400 SIP call legs (1,200 bridged calls), with the same codec being used on both sides. When you add in transcoding, that will change the system significantly, and depending on the codecs involved, the hardware may still be able to handle the load. I know from experiments I did years ago with an 8-core Xeon machine (2nd generation Xeon, so nowhere near as powerful as modern Xeon cores) that the Digium G.729 codec (software implementation) could handle over 800 channels with Asterisk 1.4; I think it's reasonable to expect that given the hardware you've proposed, transcoding 1,200 channels between G.711 ulaw and G.729A is likely to be achievable. Recording, though, is an entirely different matter. Again, since you haven't provided specifics, let's assume you are going to record the call legs 'as is' (in their native formats, unmixed). If you had 2,400 G.711 ulaw call legs to record, some simple math says that you'd need be able to push 150 megabytes per second of data onto your filesystem, on top of all the 'normal' work that Asterisk is doing. That's rather a lot, and will require that your filesystem and disk subsystem be extremely fast and well tuned. If the call legs were all G.729A, then the amount of data to write would drop to 18.75 megabytes per second, which is achievable even with inexpensive SATA disks. If you want the calls recorded in 'mixed' form (most likely in 16-bit signed linear PCM audio, since that's the easiest format to use outside of Asterisk), you'd double the amount of data going into the filesystem (now 300 megabytes per second) *and* you'd add in the CPU consumption of having to decode the incoming media streams and mix them. For G.711 ulaw this is pretty cheap and would likely not be an issue; for G.729A it's somewhat more expensive, but still might not be a problem given the amount of CPU capacity you have proposed. Now do you understand why 'benchmarks' don't provide much value for something like Asterisk? -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies Jabber: kflem...@digium.com | SIP: kpflem...@digium.com | Skype: kpfleming 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA Check us out at www.digium.com www.asterisk.org -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Capacity of single instance of Asterisk
From: Kevin P. Fleming kpflem...@digium.com Sent: Tuesday, March 13, 2012 11:02 AM To: asterisk-users@lists.digium.com Subject: Re: [asterisk-users] Capacity of single instance of Asterisk On 03/13/2012 09:43 AM, Amit Patkar | Avhan Technologies Pvt Ltd wrote: Thank for your views. Where as no one is ready to share real numbers. I am looking at benchmarks so that I can plan for resources. Since asterisk project is active for so many years, I was expecting some published numbers. You have completely missed the point that other posters have made already on this list. Let me try to express it another way. Let's say that you were browsing at an engine manufacturer's website, looking at V-8 gasoline engines, and you found one that you liked, that you felt had a good combination of features for your project. If you then contacted the manufacturer and asked them 'how fast can this engine make a car travel', what do you think their response would be? Asterisk is a toolkit; it can be configured an infinite number of ways. Any performance measurements that are made and published apply *only* to the specific configuration that was measured; it may or may not be possible to extrapolate those into other configurations, or higher/lower capacities. There are lots of published numbers of Asterisk being used in various ways and for different purposes; whether any of them apply to your specific project is debatable, and relying on them for your project would carry some level of risk. Whether you are willing to accept that risk or not is up to you. In your specific case, as has been mentioned already, it is extremely unlikely that your proposed hardware would have any trouble with Asterisk 1.8 handling 2,400 SIP call legs (1,200 bridged calls), with the same codec being used on both sides. When you add in transcoding, that will change the system significantly, and depending on the codecs involved, the hardware may still be able to handle the load. I know from experiments I did years ago with an 8-core Xeon machine (2nd generation Xeon, so nowhere near as powerful as modern Xeon cores) that the Digium G.729 codec (software implementation) could handle over 800 channels with Asterisk 1.4; I think it's reasonable to expect that given the hardware you've proposed, transcoding 1,200 channels between G.711 ulaw and G.729A is likely to be achievable. Recording, though, is an entirely different matter. Again, since you haven't provided specifics, let's assume you are going to record the call legs 'as is' (in their native formats, unmixed). If you had 2,400 G.711 ulaw call legs to record, some simple math says that you'd need be able to push 150 megabytes per second of data onto your filesystem, on top of all the 'normal' work that Asterisk is doing. That's rather a lot, and will require that your filesystem and disk subsystem be extremely fast and well tuned. If the call legs were all G.729A, then the amount of data to write would drop to 18.75 megabytes per second, which is achievable even with inexpensive SATA disks. If you want the calls recorded in 'mixed' form (most likely in 16-bit signed linear PCM audio, since that's the easiest format to use outside of Asterisk), you'd double the amount of data going into the filesystem (now 300 megabytes per second) *and* you'd add in the CPU consumption of having to decode the incoming media streams and mix them. For G.711 ulaw this is pretty cheap and would likely not be an issue; for G.729A it's somewhat more expensive, but still might not be a problem given the amount of CPU capacity you have proposed. Now do you understand why 'benchmarks' don't provide much value for something like Asterisk? -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies Jabber: kflem...@digium.com | SIP: kpflem...@digium.com | Skype: kpfleming 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA Check us out at www.digium.com www.asterisk.org -- Kevin This is an extremely well stated response. Bryant -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Capacity of single instance of Asterisk
On Tue, 13 Mar 2012, Amit Patkar | Avhan Technologies Pvt Ltd wrote: [Amit Patkar] I completely agree with you on distributing the load. At the same time, I am looking at juicing hardware as well. Can you share the number instead of saying couple hundreds? In the universe of possible configurations... This is our 'slow period,' but on my hardware, handling my application, at this moment in time, one of my hosts is handling 98 calls, has (as reported by 'top -d 30') a load average of 0.79, and CPU utilization of 2.3% user and 8.9% system. Asterisk is using 85m of virtual memory and has 35m resident. I've seen 300 calls on the same host, but that was not a limit of the host, just how many callers were using the service at that point in time. Note that my application (free chat rooms) is probably more resource intensive than your undisclosed application because all the frames from the participants have to be mixed with voodoo magic in the Zaptel driver. Also note that my application uses a bunch of AGIs. Each call invokes at least 6 AGIs -- all requiring access to a MySQL database. All the AGIs are written in C. If you can draw any conclusions from the above and relate it to your application -- congratulations :) -- Thanks in advance, - Steve Edwards sedwa...@sedwards.com Voice: +1-760-468-3867 PST Newline Fax: +1-760-731-3000 -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Capacity of single instance of Asterisk
Am 13.03.2012 21:13, schrieb Steve Edwards: On Tue, 13 Mar 2012, Amit Patkar | Avhan Technologies Pvt Ltd wrote: [Amit Patkar] I completely agree with you on distributing the load. At the same time, I am looking at juicing hardware as well. Can you share the number instead of saying couple hundreds? having a nearly same hardware setup as yours (double xeon 2,3 ghz six core with hyperthread = 24 cores and 12 GB of ram) i was able to push asterisk 10 up to 13500 concurrent calls at around 1800 calls per second. but this was only sip signaling. i also done some load tests with 8000 concurrent calls doing a playback of a unique file for each call and the load was around 30 but sound quality still sounds ok. but no one will every build a single host system for such many calls, you will have only problems with it. a typical sip proxy can handle much more sip messages as asterisk and you can easy spread the load over different machines. i guess you should start to try it out what your system and your asterisk configuration can handle without problems and do some educated guesses about it. so its not about numbers cause nobody can really answer this question without trying it out and there will still be too much space for difference to give you an exactly amount. best regards stefan -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Capacity of single instance of Asterisk
On Tuesday 13 Mar 2012, Amit Patkar | Avhan Technologies Pvt Ltd wrote: Thank for your views. Where as no one is ready to share real numbers. I am looking at benchmarks so that I can plan for resources. Since asterisk project is active for so many years, I was expecting some published numbers. We're running some 400 simultaneous calls with recording and no transcoding on a 2xQuad-core Intel boxes, 16GB RAM. The box is serving SIP clients and passes calls over an IAX2 trunk to the PSTN-connected box. Load average rarely goes above 0.5. Recording is done on a RAID array attached to a separate SCSI controller, which makes a lot of difference to performance. Regards, -- Raj -- Raj Mathur || r...@kandalaya.org || GPG: http://otheronepercent.blogspot.com || http://kandalaya.org || CC68 It is the mind that moves || http://schizoid.in || D17F -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Capacity of single instance of Asterisk
There are no such statistics. Your usage patterns are unique to you and depend on many factors. If you must look for the information then look in the mailing list archives or on voip-info.org. -Original Message- From: asterisk-users-boun...@lists.digium.com [mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of Amit Patkar Sent: Monday, March 12, 2012 2:04 PM To: asterisk-users@lists.digium.com Subject: [asterisk-users] Capacity of single instance of Asterisk Hi Can someome give tested and proven information on Asterisk capabilities? I have a server with 24 cores running at 2.4ghz and 16 GB RAM. How many concurrent SIP sessions I can run from single instance of Asterisk on this server? I wish to use G711 codec with echo cancel. And all calls needs to be recorded. What will be impact on no of session when G729a is used? Thanks Regards, Amit Patkar -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Capacity of single instance of Asterisk
On Mon, 12 Mar 2012, Amit Patkar wrote: I have a server with 24 cores running at 2.4ghz and 16 GB RAM. How many concurrent SIP sessions I can run from single instance of Asterisk on this server? I wish to use G711 codec with echo cancel. And all calls needs to be recorded. What kind of capacity are you looking to achieve? From my experience, Asterisk is not really much of a RAM hog. A couple GB is good for a couple hundred simultaneous calls. With 4 'Intel(R) Xeon(TM) CPU 3.40GHz' cores, I can handle a couple hundred simultaneous non-transcoding calls with no recording on Asterisk 1.2. With 24 cores and 16 GB on tap, you will probably find other resource limitations before either CPU or RAM are a limiting factor. Personally, I'm a 'don't put all your eggs in one basket' kind of guy. Assuming a simplistic linear relationship between my host and yours, what will you do when it crashes with 1600 calls in progress? What will you do when you need to install patches or upgrade or ... I like a couple of instances of OpenSIPS in front of several Asterisk instances, even if OpenSIPS is on the same boxes as Asterisk. What will be impact on no of session when G729a is used? Significant. -- Thanks in advance, - Steve Edwards sedwa...@sedwards.com Voice: +1-760-468-3867 PST Newline Fax: +1-760-731-3000 -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
