PixelNovel server

PixelNovel server is an internet server that stores all information related to your account, i.e. your files with their versions and comments, your login information and so on.

Special software called Subversion that runs on the server saves versions of your files in a highly efficient format. Usually only the first version of the file is stored 'as is'. For all subsequent versions Subversion calculates binary difference between the current and the new version, and only stores that difference. As a result, instead of storing numerous copies of your files, Subversion just stores a sequence of binary differences between the versions of the files.

Another advantage of this approach is that when you submit a version of a file from Photoshop, only the difference between your previous and your current version is transferred over the Internet. This makes your life much easier when your are working with large files.