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While it is possible to implement a distributed file system using plain old DCE by defining files to the CDS and defining the appropriate ACLs on them, this is not user-friendly. DCE/DFS (Distributed Filesystem - not to be confused with the Microsoft product called [http://www.microsoft.com/windows2000/techinfo/howitworks/fileandprint/dfsnew.asp Dfs] which is NOT interoperable with DCE) is a DCE based application which provides a distributed filesystem on DCE. DCE/DFS can support replicas of a fileset (the DCE/DFS equivalent of a filesystem) on multiple DFS servers - there is one read-write copy and zero or more read only copies. Replication is supported between the read-write and the read-only copies. In addition, DCE/DFS also supports what are called "backup" filesets, which if defined for a fileset are capable of storing a version of the fileset as it was prior to the last replication.
DCE/DFS is believed to be the world's only distributed filesystem that correctly implements the full POSIX filesystem semantics - including byte range locking. DCE/DFS was sufficiently reliable and stable to be utilised by [[IBM]] to run the back-end filesystem for the 1996 Olympics web site, seamlessly and automatically distributed (and edited!) worldwide in different timezones.
==External links==
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