What is VTFS and how is it different form VFS?
A. VTFS overcomes some shortcomings of the original VFS design and gains features, speed and flexibility. The main difference from a user point of view is that VTFS files must be prespecified in order to be used on disk. This may sound like an extra step, but when you compare how the two systems work, it becomes apparent how much better the VTFS is at handling typical animation and compositing information.