El jue, 13-08-2009 a las 23:53 +0200, RalfGesellensetter escribió: > Am Donnerstag 13 August 2009 schrieb José "L. Redrejo" Rodríguez: > > 34 Mbps x No of LTSP clients > > oops, this means, max. 3 clients with conventional 100 Mbit NICs? We > have been running 14 all the time, and only with gimp animation we had > run into bottlenecks. This makes 7 Mbps/client ;) > I'm sure you can boot 14 clients with a 100 Mbps card in the server, but it will take a long time to boot. My tests were done in the worst case to make stress tests in the classrooms: - For the booting needs, all the computers were booted at exactly the same time (using wakeonlan) - For the Impress tests, all the computers were running a very heavy presentation with a lot of animations and big graphics. In fact, we use a presentation that a teacher used to his classrooms, as he usually complained that OO didn't work right. It was a ppt file with more than 100 Mbytes of graphics. With the numbers I gave, we can boot 15 clients at the same time in 20 seconds and all kind of graphic application run smoothly, even if all the clients are using them. > recently, I streamed raw MPEG-HDTV via LAN, which gave me 10 Mbps. I > doubt you could need ever more than 15 per client. > streaming is very different. Using broadcast you need the same bandwith with 1 or with 100 clients. > But mulitplying the bandwith by 10 should be a good idea. Now I regret, > having given away my only GB switch for proprietary purposes. If you want your clients feel they are using real computers and avoid them complaining when they run all kind of applications (and education is a very exigent environment, very different of an office, with many different applications, videos, etc. used by teachers and students) you'll need to avoid a bottleneck in the server card. We're using good switches with 2 gigabyte ports and 24 100 Mbps ports for the clients, and our teachers and students have had the feeling of upgrading to a better computer when the old workstations have passed to be thin clients. Without the 1 (real pci express x4) Gbyte card in the server, the feeling would have been quite different. Regards. José L.
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