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The "ServerDictatedConfiguration" page has been changed by CMichaelPilato:
http://wiki.apache.org/subversion/ServerDictatedConfiguration?action=diff&rev1=9&rev2=10

  
  === Server-client transmission mechanism ===
  
- As part of the OPTIONS request, the client will send to the server the sha1 
hash of the version of the server-dictated config that it current has cached.  
If the server has a different version, it will send that to the client in the 
OPTIONS response.
+ Over ra-neon/ra-serf, the client will send to the server the sha1 hash of the 
server-dictated config that it current has cached as part of the OPTIONS 
request.  If the server has a different version, it will send that to the 
client in the OPTIONS response.  For ra-svn, a similar thing happens as part of 
the initial connection handshake/feature exchange.  This is an opportunistic 
caching approach, keeping the client in sync with the repository configuration 
any time the client contacts the repository.  This mechanism requires that 
there exist a predictable and consistent manner in which to calculate the 
checksum of the configuration.
  
  === Server-side storage ===
  

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