holch wrote: Just out of curiosity: Who fills a 1000 question survey? I am sure this is is a very special case.
If you use many conditions and filters you don't need to fill out 1000 questions.
Wonder if the php session file for every user would be even bigger with a 1000 questions survey than with simple surveys, where every user got a 1 to 1,6 MB session file created, when starting the survey. That is a problem with session files on tmp partitions.
For me "Big data" starts if a database is 500GB and more.
Would be interesting to see some database designs of other applications with survey elements.
Maybe not everyone will fill 1000 questions, but still, this is well beyond most questionnaires that I have ever seen.
Even an insane 1 hour CAPI questionnaire that we had to run some time ago should get anywhere close to that. Loads of conditions and paths depending on specific vehicle models that the respondent had to own would hide many of the questions and it still took easily 1 hour to fill, even with experienced interviewers. I need to find this monster again, but my guess would be about 200-300 questions.
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Provide your LS version and where it is installed (own server, uni/employer, SaaS hosting, etc.).
Always provide a LSS file (not LSQ or LSG).
Note: I answer at this forum in my spare time, I'm not a LimeSurvey GmbH employee.
