There was an error updating the deduplication volume
The new revision number is a sequential label that applies to the entire new tree, not just to the files and directories you touched in that revision.
However, colloquially, a revision number is used to refer to the change committed in that revision; for example, "the change in r588" ("r588" is shorthand for "revision 588") really means "the difference between repository trees 587 and 588", or put another way, "the change made to tree 587 to produce tree 588".
Most other projects probably would have called the product "1.0" much earlier, but we deliberately decided to delay that label as long as possible. Such limitations are always documented in the release notes of our releases.
We were aware that many people were waiting for a 1.0 before using Subversion, and had very specific expectations about the meaning of that label. The client and server are designed to work as long as they aren't more than one major release version apart. Our client/server interoperability policy is documented in the "Compatibility" section of the Subversion Community Guide.
The Subversion server can also be run on any platform where APR runs, but cannot host a repository on Win95/Win98/Win Me. The "Subversion Filesystem" is not a kernel-level filesystem that one would install in an operating system.
Also, the revision number should not be used as the publicly-visible release number of a particular project in the repository.
Remember to take in account other applications running on the same server; for example, repository browsers use resources too, independently of Subversion itself. It comes with a command-line client that uses them.
In general, you can expect to need much less server memory than you would for comparable CVS repositories. There are two different Subversion server processes: either svnserve, which is small standalone program similar to cvs pserver, or Apache httpd-2.0 using a special mod_dav_svn module.
Different versions of Apache can happily coexist on the same machine.
Just change the First, note that Subversion has no concept of projects.