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nfs - Today CSCI 5105 Foundations of Modern Operating...

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1 CSCI 5105 Foundations of Modern Operating Systems Instructor: Abhishek Chandra 2 Today Distributed File Systems Network File System (NFS) 3 Distributed File Systems Why do we need these? Data sharing in distributed systems Provide easy interface to users Hide distributed nature of data Distributed File Systems: Form the basis for several distributed systems Also illustrate various principles of distributed systems 4 Distributed File Systems: Issues File Service What interface/operation is provided to users? How is data stored and fetched? Naming and location Where is a file located? How do different users refer to the same file? Sharing, caching and replication What happens for concurrent writes? How to tradeoff consistency-performance? Fault Tolerance and Security What if file server fails? How to authenticate remote users?
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2 5 Distributed File Systems: Design Depends on the usage environment Scale of system
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