[IIAB] [UKids] Internet-in-a-Box speed profiling tips on different CPUs?

[Tim Moody]

Of course, the trick in all this is to make the tests repeatable so that comparisons are meaningful.  I agree with Tony that accessing select maps, wiki pages, and perhaps videos are good candidate load tests and I would add some collaborative tests that exercise ejabberd.

Some efforts have been made in the past such as http://wiki.laptop.org/go/XS_Load_Testing by one of Sameer’s grad students and hyperactivity http://lists.laptop.org/pipermail/server-devel/2008-September/002156.html, which I never got to work with xsce.

Apache JMeter or another tool might help in all this http://jmeter.apache.org/.  There are commercial tools that allow scripting of server requests, but most are expensive.

Tim

From: Tony Anderson 
Sent: Saturday, June 07, 2014 6:27 AM
To: unleashkids at googlegroups.com 
Subject: Re: [UKids] Internet-in-a-Box speed profiling tips on different CPUs?

All such testing is warranted and will certainly be helpful. 

My intuition is that videos should be downloaded to the Journal and viewed with the Jukebox activity. 
Aside from the obvious advantage in that the child can take the laptop home and view the video at his or her leisure, a download supports sharing of the bandwidth. That is the approach I have taken with 
BERNIE.

Perhaps Adam can give us an idea of the situation at the deployments in Haiti. Saint Jacob's represents a reasonable example of the deployments I am familiar with: three classrooms, 30-40 XOs per classroom, a total of 100 XOs connected to a single school server, one router per classroom, dhcp provided by the server (all laptops on the same LAN). 

Representative tasks:

A classroom of students performing a map lesson with open street maps - locating their school by moving the map center and zooming in until Kigali is at the center with maximum zoom.

A class doing a research project on different types of reptiles using wikipedia for schools. Each student is to write a report of 50-100 words with an image of a reptile they select. Assume they search for reptiles. Go to the article. Select a reptile type, e.g. lizard and then download an image from the article.

A class doing a Khan Academy lesson, e.g. multiplying 2 digits by 2 digits,  on with some watching the video and then doing the associated exercise, others doing the exercise. 

Tony


On 06/07/2014 08:18 AM, Adam Holt wrote:

  As RichardS & GeorgeH valiantly get up to speed clocking Internet-in-a-Box bottlenecks on side-by-side school servers like Nepal's MSI DC111 (Celeron 1.8GHz, 2GB RAM) and faster, with many developing world deployments worldwide itching to follow -- who has intuition what they should test/compare first?

  While streaming many different Khan Academy videos simultaneously, to many Wifi-connected devices and browser tabs for starters?


  I can only assume they'll start with a standard HW recipe along the lines of:

    1.. Install XSCE 5.0 per http://schoolserver.org onto a system like Nepal's $275 MSI DC111 or comparable/faster.  Cheaper is great if performant!

    2.. Copy IIAB (all ~700GB if possible) to that school server's internal HDD using "rsync -a" (too many issues with dd).

    3.. Curt is helping me distribute a brand-new release of IIAB to testers in coming weeks -- allowing diverse speed tests of Wikipedia's experimental new full-text-search and Open Street Map?

    4.. Later/Bonus: are there cases where IIAB on an external USB3 drive is almost as fast as an internal HDD?  2GB RAM as good as 4GB RAM?

    5.. When the going gets tough evaluating 3rd world deployments' imminent HW/SW choices, compare notes on irc chat channel #schoolserver (http://webchat.freenode.net) 
    6.. Scream for real (with joy ;) during our weekly Thursday calls no matter how ugly things get! 
  Thanks for bright ideas, any/all!  Thousands stand to benefit, and rather quickly.  So far, possible early areas of investigation are summarized here:

  http://groups.google.com/group/unleashkids


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