unionfs-fuse is a unionfs filesystem implementation using fuse.
It is meant to be way more flexible than the current in-kernel unionfs
solution.
Why choose this stuff?
* The filesystem has to be mounted after the roots are mounted when
using the standard module. With unionfs-fuse, you can mount the
roots later and their contents will appear seamlesly.
* You get caching (provided by the underlying FUSE page cache) which
speeds things up a lot for free.
* Advanced features like copy-on-write and more.
Why NOT choose it?
* Compared to kernel-space solution we need lots of useless context
switches which makes a kernel-only solution clear speed-winner.
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