[Using Sakai] Large Course Testing

[Stephen Marquard]

Hi,

We've had courses use Sakai with Samigo for final exams for about 2 years now (with up to 400 students). Basically you should do some form of load-testing in advance, replicating the exam scenario as closely as possible.

The main performance issue we've run across is with large complex assessments (lots of questions randomly selected from multiple large question pools), starting the assessment generates a lot of db traffic, described here:

http://jira.sakaiproject.org/browse/SAK-14877 

so it tends to slow everything down at the start of the test, then during the test itself it's fine. FWIW, we tested Mneme with the same scenario, and it was worse than Samigo (in query volume).

Regards
Stephen
 
>>> David McPherson <dmcphers at vt.edu> 11/18/2009 5:07 PM >>> 
Hello All,

We have a course here at VT with about 1200 students in it and they are using Sakai to run their final exam.  We are meeting with the group in charge of the course and we are wondering if any one else out there has any experience with testing this many or even just a lot of students and what your recommendations are in terms of settings in Samigo.  We are also interested in how your Samigo performed under these sorts of loads and what if any special configuration changes to the server may have been done to have these tests perform better.

Thanks in advance,
Dave
--
David McPherson
1200A Torgersen Hall
Virginia Tech
Director, OCS
540-231-8993
http://www.edtech.vt.edu/ocs/

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