Today, most SVN repositories do not have a db/fsfs.conf file as they are format=3 repositories which were made with svn version < 1.6.
If users upgrade their repositories to format=4 (default for svn 1.6) then the rep-sharing option default changes to on when there is no fsfs.conf file. This means SVN will start to use an SQLite database which does not work properly in AFS. The rep-sharing function is not useful for CERN's use of SVN.
In order to prevent this happening, we plan to put an fsfs.conf file in all SVN repositories which do not already have them in order to set this rep-sharing function off. A small number of repositories already have this fsfs.conf where they have been upgraded by some scripts - these will not be changed.
Adding this db/fsfs.conf file to the existing repositories should be transparent.
Note there is no need to upgrade SVN repositories to the new format, but this may occur in some scripts. We will do this upgrade change at a later date.
Prevent problems which would occur if SVN starts to use an SQLite database if the rep-sharing option is turned on (or defaulted on) by repository format change - see description above.