This is the file system used in the SingOS operating system. It is a simple file system to save some data within SingOS.
Its predecessor was vsfs (Very Simple File System), but vsfs was so simple that it didn't worked properly.
This is a walk through video of the lsfs FUSE implementation. It is in danish and is used as an helpfull video for the operating systems course at IMADA/SDU (DM510) for the FUSE assignment in the course.