the local user's home folder gets wiped upon logout.
Don't do that.
It's a necessary evil or else the hard drives fill up. I have >200 people using the machines. And with the media cache the way it is it will definitely fill up the drives in no time.
Get some >200 extra HDD's.
I'm the post production facility manager at a college and we have Mac Pros where the local user's home folder gets wiped upon logout.
Students constantly have issues with the media cache and database. They waste so much time re-conforming audio for projects, and it's lethal for docs. We're using CS5.5
I've been telling my students to create a dummy project upon loggin in, change the media cache and database location to somewhere on their external hard drive. Then they close the dummy project and open the proper project where it should find everything, but it still re conforms.
What am i doing wrong?
It could be a case of what they're doing wrong. Your suggestion looks like it should work.
If you've tried this, and it works for you, that should tell you that they're not doing it right.
Maybe they need a refresher on how to follow your instructions to the letter.