On Thu, Jul 1, 2010 at 1:45 PM, David Leeming <[email protected]> wrote: > What experience do we have on the latest thinking about the capacity of a > single server? Here in Kosrae they have good 24/7 power availability and > air-conditioned offices in five of the schools. We can therefore specify > powerful machines, even dedicated server models if need be. If we segregate > off each of the 24 class groups, would a single powerful machine server be > able to handle 500 students in 24 classes (courses) simultaneously? (of > course in practice that maximum load will rarely occur).
The XS will be ok. Add RAM (webapps and proxy are memory-bound) and a large HD. What *will* melt with 500 active users is the WiFi infra. > floors, 12 classrooms per floor, in U-shape layout. I would place one AP per > classroom spread evenly around the school – that would be about 20 students > per AP. The APs set up all on eth1 LAN with the same SSID. If we use > multiple servers, we’d use different SSIDs for each. I have not deployed > such a large site before so any comments on this would be appreciated. One AP per 20 is more than good. We've seen some good APs handle 40~50 (with modest traffic). Do NOT go for multiple servers. Therein lies madness. > In PNG SDP’s project in North Fly, PNG, we are using small “eboxes” because > of the need to run on solar power. We have deployed one full-campus > wireless/server installation, quite a small school (160 total, 80 users in > the first roll out). These users are divided into 3 class groups, as Moodle > courses. So they are segregated. We have had feedback that it still gets > slow / congested when all users are on simultaneously (80 users in 3 > separate courses). Interesting. Ask them for a day and time when it was sliggush within the last couple of weeks. sysstat is running on the XS. Look at the /var/log/sa/sar* files (or call the 'sar' command for today's output) . It keeps approx 1 month IIRC. Filenames end with the 'day-of-the-month' number. > I don’t have an opportunity to visit the school and Damn - anyone with the skills to find those files for you? cheers, m -- [email protected] [email protected] -- School Server Architect - ask interesting questions - don't get distracted with shiny stuff - working code first - http://wiki.laptop.org/go/User:Martinlanghoff _______________________________________________ Server-devel mailing list [email protected] http://lists.laptop.org/listinfo/server-devel
