Any transparent filesystem for SunOS

Back before Solaris SunOS had a cool feature called transparent file system. The basic concept allowed disk files systems to be stacked like transparencies on an overhead projector. And allowed the presenter to draw on the top transparency.

What is a modern equivalent of the transparent filesystem? I want/need to stack multiple drive filesystem.

Solution 1:

This is deprecated feature. Unfortunately.

Solution 2:

On Solaris I think you're out of luck, but Linux has overlayFS, AuFS and some others.

Solution 3:

It's none on Solaris or its derivatives: "… The translucent file system (TFS) type has been withdrawn from the SunOS release 5.7 software …"

In despite in this quote it's referred as "file system" actually it seems used to be a service running in user-space.