fusefile

This project implements a "fuse" device to mount a concatenation of fragments of one or more files as a single file.

The fused file allows writing to fragments (without changing their sizes); of course only for writable fragment files. The fused file may be set up with an overlay file to capture changes instead of writing the underlying fragment files.

This is a usage example to set up a fused file C consisting of files A and B:

$ fusefile C A B

This is an example of tearing down a fused file C:

$ fusermount -u C

See the man page for usage details and some more examples.