Divergefs is a user level file server which layers arbitrary number of directory trees on top of the base directory mountpoint based on user specified rules from rulefile. Its uses include, but are not limited to, temporarily modifying a few files on read-only media or speeding up compilation by storing object files locally instead of on a distant file server.
Project page: divergefs
Man page: divergefs(4)
Source code: divergefs.tar.gz
Also in /n/sources/contrib/de0u/
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