Grouper Developers Forum

["Michael R. Gettes" <>]

Tom, given the structure Duke is using - are there perf impacts of  
this structure
and would grouper (today) perf better if the name space was flat  
below duke:siss:courses???
I can see how schools would want to do what Duke has done - and I  
think this would
need solving at some point either way - but does grouper today perf  
better with
a more flattened space?

/mrg

On Jul 10, 2007, at 12:14, Shilen Patel wrote:

> Tom Barton wrote:
> > I'm going to start using more specific subject lines to start  
> > separate threads as we continue to delve into the issues raised by  
> > Shilen...
> >
> > Shilen Patel wrote:
> > > > > The import file is 230 MB (from the 1.1 Grouper export).  There  
> > > > > are
> > > > > 846,102 memberships, 102,093 groups, and 89,514 stems.
> > > >
> > > > I'm curious about the nearly 1-1 ratio of stems to groups.  
> > > > What's your stem structure look like, and when do you decide to  
> > > > create a stem vs create a group?
> > >
> > > About 99% of our stems and groups and 50% of our memberships are  
> > > from class data.  The rest is almost all from the dynamic groups.
> > >
> > > Our class data groups are formated like the following:   
> > > duke:siss:courses:<SUBJECT>:<CATALOG NUMBER>:<SECTION  
> > > NUMBER>:<CLASS NUMBER>:<TERM NUMBER>:<instructors or TAs or  
> > > students>.  So the subject, catalog number, section number, class  
> > > number, and term number are stems.   Most of the stems were  
> > > probably created with the first year of classes and as the number  
> > > of years of classes increases, the stems to groups ratio will no  
> > > longer be around 1-1.
> >
> > I'm curious. Do you anticipate using this stem structure to  
> > differentiate among people with STEM or CREATE privileges, to  
> > facilitate browsing through the mass of course groups, and/or is  
> > it a way of affixing an appropriate attribute value to a course  
> > group?
>
>
> The primary reasons for the stem structure is to facilitate  
> browsing through the courses and to provide enough information in  
> the group name to uniquely identify the course.  The stem structure  
> also allows us to cleanly have multiple groups per course.