unionfs and nullfs combination

[Nikos Vassiliadis]

Hi,

One relatively cheap way to create thin jails in the pre-ZFS era,
was to combine nullfs and unionfs (1). This seem to work only in
10 and previous branches. Do you use such a combination?

It seems like a very relevant feature nowadays, when people
use all these cloud-based systems, which oftentimes have little
resources to run ZFS and UFS is most likely a better choice...

1:
> https://rsmith.home.xs4all.nl/freebsd/using-nullfs-and-unionfs-for-the-ports-tree-in-a-jail.html

Thanks in advance for your thoughts,
Nikos