I wonder if zip and its imitators, with it's smart choice of compression, might outperform a compressed FS. I am wondering if somtone has set it up so a zip can be mounted as a file system. Yup:
http://www.google.com/search?q=zip+file+system+mount
A FS with versioning might make backups simpler -- just lay it down and if it is different, the old one is versioned into the background. I could have swore wiki had a real nice chart of many FS, but this is all I found:
https://en.wikipedia.org/wiki/List_of_file_systems But then I looked in see also and found it:
https://en.wikipedia.org/wiki/Compar...f_file_systems
I always wanted to see a FS where directories are enhanced to allow them to contain small files like an archive, and by extension small directories, so a big empty file tree might physically be one directory node. Files that grow past a threshold get rousted out. I guess zip gets pretty close to that. It recovers space from lightly used pages, like a 4.1 page file using 5 pages, and allows compression transparently. A tree or hash container for directory entries might be nice, too.