Re: [asterisk-users] OT: Bandwidth calculations
ISP 10% rule is what you are asking about expected that average usage is 10% of total subscribers with bursts higher But remember to plan well for those bursts and ensure you have sufficient excess capacity. Certain events can have a significant effect on your burst pattern: some fellows are kicking a ball around in South Africa for three weeks, which is having an understandable effect on bandwidth usage globally. Same happened a couple of years ago during the Olympics. Regards, Chris -- _ -- 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] OT: Bandwidth calculations
Randy R wrote: Hi, I know some of you are very experienced as to the working of networks. I wondered whether there is some accepted way of determining bandwidth needs based on the network traffic over time. For example, looking at the figures for the network traffic through the server interface, we have hourly, daily and monthly figures. If everything were linear, taking the hourly figure and dividing it by 3600 (or the daily by divided 3600*24) would give us the required bps, but this average is pretty meaningless. Those of you who have experience and education in this area, where can I look for guidance (links?) and do you have any rules of thumb you'd care to share? I'm actually looking for this for a web server not VoiP, but any info is welcome. It seems obvious to me that taking the per second average and multiplying it by some kind of seat of the pants number must give a decent idea? WHat is that magic number? Thanks in advance for any ideas. /r It depends on the charging structure your ISP is using. From an ISP point of view when they purchase transit links all pricing is done on the 95th percentile basis. So for example you might purchase a 50Mbps connection over a 100Mbps interface. You would get a guaranteed 50Mbps but could burst up to the full interface speed. Bandwidth measurements are taken normally every 5 or 10 minutes. The 95th percentile is calculated by discarding the top 5% results and the next highest reading is the 95th percentile. If this is below the 50Mbps then all is fine otherwise you will receive a bill for overusage. For a web server this is probably a good start but would depend on how spiky your bandwidth graphs are. You might want to lower the speed if you tend to have lots of people downloading on a particular day of the week for example as the 95th percentile would be much greater than your average bandwidth. If you just look at your bandwidth graphs you will probably get the best idea of a suitable figure. -- _ -- 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] OT: Bandwidth calculations
On Fri, Jun 25, 2010 at 11:36 AM, Gareth Blades list-aster...@skycomuk.com wrote: For a web server this is probably a good start but would depend on how spiky your bandwidth graphs are. You might want to lower the speed if The max in the past 24 was 140MB an hour, but I've seen up to 240MB in an hour. This happens maybe once in a day. The average is more around 60-75 MB in an hour. The interface is currently at 30Mbps. Obviously, if 10 people look at the same time at some fat page, the server will be brought to its knees. The video is all on a separate CDN and I'm trying to get the people to add the larger images to that. /r -- _ -- 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
[asterisk-users] OT: Bandwidth calculations
Hi, I know some of you are very experienced as to the working of networks. I wondered whether there is some accepted way of determining bandwidth needs based on the network traffic over time. For example, looking at the figures for the network traffic through the server interface, we have hourly, daily and monthly figures. If everything were linear, taking the hourly figure and dividing it by 3600 (or the daily by divided 3600*24) would give us the required bps, but this average is pretty meaningless. Those of you who have experience and education in this area, where can I look for guidance (links?) and do you have any rules of thumb you'd care to share? I'm actually looking for this for a web server not VoiP, but any info is welcome. It seems obvious to me that taking the per second average and multiplying it by some kind of seat of the pants number must give a decent idea? WHat is that magic number? Thanks in advance for any ideas. /r -- _ -- 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] OT: Bandwidth calculations
ISP 10% rule is what you are asking about expected that average usage is 10% of total subscribers with bursts higher ~ Andrew lathama Latham lath...@gmail.com * Learn more about OSS http://en.wikipedia.org/wiki/Open-source_software * Learn more about Linux http://en.wikipedia.org/wiki/Linux * Learn more about Tux http://en.wikipedia.org/wiki/Tux On Thu, Jun 24, 2010 at 3:46 PM, Randy R randulo2...@gmail.com wrote: Hi, I know some of you are very experienced as to the working of networks. I wondered whether there is some accepted way of determining bandwidth needs based on the network traffic over time. For example, looking at the figures for the network traffic through the server interface, we have hourly, daily and monthly figures. If everything were linear, taking the hourly figure and dividing it by 3600 (or the daily by divided 3600*24) would give us the required bps, but this average is pretty meaningless. Those of you who have experience and education in this area, where can I look for guidance (links?) and do you have any rules of thumb you'd care to share? I'm actually looking for this for a web server not VoiP, but any info is welcome. It seems obvious to me that taking the per second average and multiplying it by some kind of seat of the pants number must give a decent idea? WHat is that magic number? Thanks in advance for any ideas. /r -- _ -- 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] OT: Bandwidth calculations
http://www.asteriskguru.com/tools/bandwidth_calculator.php ~ Andrew lathama Latham lath...@gmail.com * Learn more about OSS http://en.wikipedia.org/wiki/Open-source_software * Learn more about Linux http://en.wikipedia.org/wiki/Linux * Learn more about Tux http://en.wikipedia.org/wiki/Tux On Thu, Jun 24, 2010 at 3:46 PM, Randy R randulo2...@gmail.com wrote: Hi, I know some of you are very experienced as to the working of networks. I wondered whether there is some accepted way of determining bandwidth needs based on the network traffic over time. For example, looking at the figures for the network traffic through the server interface, we have hourly, daily and monthly figures. If everything were linear, taking the hourly figure and dividing it by 3600 (or the daily by divided 3600*24) would give us the required bps, but this average is pretty meaningless. Those of you who have experience and education in this area, where can I look for guidance (links?) and do you have any rules of thumb you'd care to share? I'm actually looking for this for a web server not VoiP, but any info is welcome. It seems obvious to me that taking the per second average and multiplying it by some kind of seat of the pants number must give a decent idea? WHat is that magic number? Thanks in advance for any ideas. /r -- _ -- 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
[asterisk-users] OT: Bandwidth calculations and PCI/PCIX/PCIE
I found this interesting but old white paper at Dell.com tech solutions and another one from INTEL. It compares bandwidth usage of a PCI, PCI-X, PCI-E in33/66/100/133mhz bus and different technologies that can saturate the bus. It helped me understand the bandwidth required for TDM (sangoma/digium) cards and how far can I push the PCI bus in an old and newmotherboard. I hope it help others to understand how much a network card can pump and make calculations about consumptions in TDM cards. make sure the link is a one-line in your browser Original online document http://www.dell.com/content/topics/global.aspx/vectors/en/2004_pciexpress?c=uscs=08Wl=ens=bsdv here is the link to the same Dell article but in PDF form. http://www.dell.com/downloads/global/vectors/2004_pciexpress.pdf Another interesting document from INTEL www.intel.com/technology/pciexpress/devnet/docs/WhatisPCIExpress.pdf The facts learned from these documents are: a- 3.3volts/32bit PCI cards can be used in PCI-X slots. (i just discovered that, sorry forliving under a rock) b- The slowest PCI card in Mhz will dictate that PCI-X bus speed. So avoid degradation by not installing a PCI card and a PCI-X card in the same bus (check you motherboard design), your motherboard design usually have two buses. c- If you use a PCI-X based implementation motherboard, you will not saturate the bandwidth of the board, using Quad or Octal port cards (e1/t1/j1). -- Erick PerezPanama SistemasIntegradores de Telefonia IP y Soluciones Para Centros de DatosPanama, Republica de Panama Cel Panama. +(507) 6694-4780 ___ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
