e2dis: a Jigdo-like tool for Ext2+ FS images
BTW, I've just announced  the availability of the code which
(given some attention and care) may be turned into a Jigdo-like
suite for Ext2+ FS images.
(The casuality of fragmentation on such filesystems greatly
reduces the applicability of the FS-agnostic Jigdo tool.)
Perhaps, this may lessen the burden of the distribution of
Debian virtualization images. (Should it become a part of the
Alternatively, this tool may allow for “smarter” virtualization
images' backups. Or, it may be used to save the bandwidth when
sending a whole virtualization image, e. g., to demonstrate a
hard to reproduce bug.
FSF associate member #7257