Dsitributed File Systems. Prepared By:- Monika Patel. Outline:-. What is Distributed File System? (DFS) Characteristics of DFS Transparency Concurrent File Updates File Replication Fault Tolerance Security IBM’s DCE Distributed File Service . Why we need File System ?.
Access Transparency:-A user can login in at any host in the system with uniform login procedure, independent of the host.
In other word program designed to work on a local file can work on a remote file without modification
Location Independency:-files or groups of files can be
relocated without changing their actual path (or file) names.
Mobility transparency:- A file may be moved, either by systems administrators or automatically.
Performance transparency:- programs should continue to perform satisfactorily, even under heavy load.
Scaling transparency:- file systems can be expanded by incremental growth to deal with a wide range of loads and network sizes.
1]Performance Characteristics of the DCE Distributed File Service By Agustin Mena III and Carl Burnett.
 Distributed operating systems & Algorithms,By Randy chow,Theodore johnson.
 Distributed File SystemsPierre Boulet Masters Informatique TIIR et IAGL September 28,2006.
Thank You. access to files, restricting access to files according to users‘ authorizations and the type of access requested