> For what it's worth, Solaris used to have such a thing long ago -- it > was called "translucent file system." It was abandoned ... and I > suspect some of the history of it might be worth digging up.
interesting. i did some digging around, looks like "tfs" was in SunOS4.1.1/Solaris 1, but was gone by Solaris 2.5.1. http://docs.sun.com/app/docs/doc/801-6638/6i10i9utu?a=view suggests it was gone by SunOS5.4. i found a suggestion that it was limited in the sense that multiple (>1) overlays were prohibited, but i haven't been able to confirm this. alan This message posted from opensolaris.org
