"It is about time to take a step back and describe what I have been implementing," began Daniel Phillips, referring to his new Tux3 filesystem. He provided a simple ASCII diagram that detailed the filesystem's hierarchical structure, describing each of the elements. About one he noted, "the volume table is a new addition not central to the goals of Tux3, but a nice feature to have given that it comes nearly for free. One Tux3 volume can have an arbitrary number of separate filesystems tucked inside it, indexed by a simple integer parameter at mount time. People say they like this idea and it imposes no significant complexity, so it goes in." Daniel continued:
"Each volume has a metablock pointing at the forward log chain for the volume, a version table that describes the hierarchical relationship between versions (snapshots), an atime table to take care of that horrid legacy Unix feature, and an inode table containing files and attributes of files. [...] Versioning takes place in three places, versioned pointers in the atime btree, versioned extents in a file data btree and versioned attributes in the inode table. [...] Notice the absence of a journal, the functionality of which is provided by forward log elements that I described in the Hammer thread (and will eventually write a separate post about)."