Why revision number in version control does not increase by 1 all the time?

Question

When I use "svn log", for example, to view the revision history, I find that the revision number does not increase one by one all the time. For example, one revision has revision number "1234" but its next revision has revision number "1256" instead of "1235". What happens between these two revisions? What their revision numbers are not consecutive?

Thanks.

Answer 1

Your project within the SVN repo might not be the only one.
Any revision in any part of the SVN repo will increment the global revision number by one.
See also:

• "How increment in revision number calculated in subversion".
• "Subversion revision number across multiple projects"

Answer 2

If you get the log from the root of your repository, you will see that the revision number is incremented one by one. BUT, you are getting the log from a sub-directory of your repo. This means that there are lots of revisions that does not belong to your sub-directory.