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Editorial Team
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Asked: 2026-05-13T19:34:16+00:00

I’d like to understand when creating a branch , SVN just make a entire

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I’d like to understand when creating a branch, SVN just make a entire copy from trunk or make use of some mechanism to achieve it?

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  1. Editorial Team

    AFAIK, what it makes is a reference to the Revision you’re branching from and then records the Deltas for anything you check in.

    To quote the SVN book:

    Subversion’s repository has a special design. When you copy a directory, you don’t need to worry about the repository growing huge—Subversion doesn’t actually duplicate any data. Instead, it creates a new directory entry that points to an existing tree. If you’re a Unix user, this is the same concept as a hard-link. From there, the copy is said to be “lazy”. That is, if you commit a change to one file within the copied directory, then only that file changes—the rest of the files continue to exist as links to the original files in the original directory.

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