I have been told the practical/effective network bandwith is 1/3 of the rated speed, that is the effective bandwidth from a 100Mb/s network is about 33Mb/s.
Thanks, George Kirkham From: Jaime Balbino [mailto:jaimeb...@gmail.com] Sent: Friday, 8 March 2013 4:13 PM To: user@openmeetings.apache.org Cc: openmeetings-u...@incubator.apache.org Subject: Re: bandwidth and simultaneous connections Thanks Sebastian, but I have to provide a practicable scenario, anticipating The demand. In the primary use each room will have only 2 participants with audio, video, whiteboard and chat. The video can be 240x180 (40 Kb/s) or audio + video = 70Kb/s. With this information I calculate traffic sent into the server: 2 * 70Kb/s = 140Kb/s and server traffic sent out: 2 * (2-1) * 70Kb/s = 140Kb/s (I only need it). So every room of this example uses only 140K/ s of bandwidth server. Making a simple division it says, in theory, than with a server bandwidth of 100Mb/s I can have up to 726 people simultaneously connected in 363 rooms (2 people per room in this example). This forecast shall is correct? Thanks again! 2013/3/8 seba.wag...@gmail.com <seba.wag...@gmail.com> Hallo Jaime, I would probably not look at the CPU/memory consumption as the main limiting factor is the bandwidth. To calculate exact numbers of the bandwidth you need to know: 1) What is the main use-case scenario (1:1 meeting or 1:10 meetings) 2) How many of the participants broadcast and how many of them view the stream 3) What video resolution will the users use for the conference (screensharing session won't be included in this scenario) Based on that you can calculate the bandwidth needs per conference room, and then calc for example the bandwidth need for the lets say 10, 20, 50 and 100 conference rooms. So its correct: Depending on the use-case you can have very different numbers. Sebastian 2013/3/8 Jaime Balbino <jaimeb...@gmail.com> Hello, I have a question very common on this list, but that does not have a generic answer and replicability. I am needing to know for sure how many people can I have simultaneously an installation of OpenMeetings (4x Core/8Gb RAM and bandwidth 100 Mb/s). The standard situation is as follows: many rooms with 2 participants face-to-face and witheboard. How many rooms and people support these configuration simultaneously? Using calculations already posted here came to very different numbers among only 30 people until 1000 (!). Thanks! -- Sebastian Wagner https://twitter.com/#!/dead_lock <https://twitter.com/#%21/dead_lock> http://www.webbase-design.de <http://www.webbase-design.de> http://www.wagner-sebastian.com <http://www.wagner-sebastian.com> seba.wag...@gmail.com <mailto:seba.wag...@gmail.com>
