On Thu, Mar 29, 2012 at 12:13 AM, George Hunt <georgejh...@gmail.com> wrote: > Hi all, > > In the Philippine deployments, the local decision makers have tried to buy > locally, and the machines use roughly 80 watts, idling, bursting to 120 > during startup. > > The inadequate power situation causes rolling brown outs and load shedding. > I've been unable to document the decrease in performance they might > encounter if they shifted their usage to a dual core Atom 30 watt MSI or a > 10 watt fitpc. Selling the idea of deep cycle batteries for school servers, > would be a lot easier if we didn't need so much power drain! > > For lack of anything better, I started asking them to time the startup time > until the school server presented a logon prompt. Yet, I also noticed that > if network interfaces were down, or if there was no wan connectivity, there > would be timeouts which would add noise to such an approach. > > As I have understood what I've read, the ejabberd service is currently the > performance bottleneck. I don't have much familiarity with cpu test > suites. Does anyone have a suggestion on benchmark programs that would be > useful in predicting actual performance in the schools? If no one has > experience in the area, I can do the googling and reading. Sometimes it > makes sense to ask first. > > Thanks > George > > _______________________________________________ > Server-devel mailing list > Server-devel@lists.laptop.org > http://lists.laptop.org/listinfo/server-devel >
You could run nmon on the server and gather stats. https://www.ibm.com/developerworks/aix/library/au-analyze_aix/ and http://nmon.sourceforge.net/ This is what Ben Tran used in gathering data for his thesis on loading the server. http://wiki.laptop.org/images/4/46/Testing_the_OLPC_School_Server_Benjamin_Tran_SFSU.pdf (see page 44) nmon also has a Excel spreadsheet to import the data and produce pretty graphs. We also run munin on the Jamaica servers to gather rolling stats. http://munin-monitoring.org/ and https://library.linode.com/server-monitoring/munin/fedora-14 cheers, Sameer -- Sameer Verma, Ph.D. Professor, Information Systems San Francisco State University http://verma.sfsu.edu/ http://commons.sfsu.edu/ http://olpcsf.org/ http://olpcjamaica.org.jm/ _______________________________________________ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
