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Chapter 8: Developer Information
work-free reversion of modified or missing files, smaller transmission of changes to
the server—but comes at the cost of having each versioned file stored at least twice
on disk. These days, this seems to be a negligible penalty for most files. However, the
situation gets uglier as the size of your versioned files grows. Some attention is being
given to making the presence of the text-base an option. Ironically though, it is as
your versioned files’ sizes get larger that the existence of the text-base becomes more
crucial—who wants to transmit a huge file across a network just because they want
to commit a tiny change to it?
Similar in purpose to the text-base files are the property files and their pristine prop-
base copies, located in .svn/props and .svn/prop-base respectively. Since directories
can have properties, too, there are also .svn/dir-props and .svn/dir-prop-base files.
Each of these property files (working and base versions) uses a simple hash-on-disk
file format for storing the property names and values.
WebDAV
WebDAV (shorthand for Web-based Distributed Authoring and Versioning) is an
extension of the standard HTTP protocol designed to make the web into a read/write
medium, instead of the basically read-only medium that exists today. ...