>> 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.
It was never in Solaris 2.x >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. No, it was not. I could do arbitraty nestings and had an elaborate whitelist scheme (allowing you to delete underlying files) But the more you stacked the slower it got. (It was used for NSE, Sun's last attempt at a filesystem based source management system) Casper
