Pages with tag Copy on Write

How to create a copy-on-write clone of a file in Node.js It's been refreshing to learn of an advance in Linux/Unix file system semantics over the last 35 years. In 1984 I first used symbolic links, on a Vax running 4.2BSD. That was a significant advance over the hard links that had existed for many years before. The other day I learned that both Mac OS X and Linux support a new kind of link, a reflink, that is a form of copy-on-write for certain file systems.