Maximum for …

[Konrad Neuwirth]

Is there an upper bound on the number of nullmounts that one can pragmatically do? We're currently reorganizing our web hosting infrastructure, and ideally, I would like that to be organized so that the webspace for customers ends up in its own chroot jail. But in order not duplicate files ever so often, I'd like to have two or three directories that get mounted into the users specific spaces.

But that would mean a couple of hundred null mounts. 

Is that impractical? 

Thank you,
 KOnrad