Description:

Cromfs is a compressed read-only filesystem for Linux. Cromfs is
intended for permanently archiving gigabytes of big files that have
lots of redundancy.

In terms of compression it is much similar to 7-zip files, except that
practical realtime access (albeit much slower than on most other
filesystems) can be provided for the whole archive contents; the user
does not need to launch a program to decompress a single file, nor
does he need to wait while the system decompresses 500 files from a
1000-file archive to get him the 1 file he wanted to open.

The creation of cromfs was inspired from Squashfs and Cramfs.