This paper describes an implementation of a file hoarding system for the Linux/NFS platform. Designed as a cache manager on the mobile Linux platform, the system supports fully connected, partially connected and disconnected mode of operations. The unique feature of the system is the mechanism used for its implementation, i.e. the local proxy of the remote NFS server. This choice assures high flexibility and portability of the system since no modifications are required in the native system's kernel source code. The experiments presented in the paper show that this mechanism provides a viable solution for implementing fiie system extension~ such as file hoarding and disconnected operation.
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