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Distributed File System

Learn about Distributed File Systems (DFS) and how they manage files and folders across multiple computers. Discover the benefits of DFS, such as simplified file access and storage, and explore DFS namespaces, replication, and architecture.

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Distributed File System

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  1. Distributed File System

  2. Definition • Stands for "Distributed File System." A DFS manages files and folders across multiple computers. It serves the same purpose as a traditional file system, but is designed to provide file storage and controlled access to files over local and wide area networks. • Even when files are stored on multiple computers, DFS can organize and display the files as if they are stored on one computer. This provides a simplified interface for clients who are given access to the files.

  3. Why Was DFS Created? • Having files spread across multiple file servers confuses users and makes it difficult for them to find their files. • Sharing files in a single location creates performance lag when they are accessed across slow WAN links, and a single point of failure when those links go down. • It is difficult to backup critical files and data when they are dispersed haphazardly on multiple file servers at multiple remote locations.

  4. To Solve the Problems • DFS Name Spaces • DFS Replication

  5. DFS Namespace • A DFS namespace is a virtual directory tree that points to or references one or more network shares called targets.

  6. DFS Architecture

  7. DFS Modes • Stand-alone • Domain-based

  8. Stand-alone DFS • Accessed via: \\Servername\DFSRoot • Can be: DC, Member server or stand-alone • Namespaces: Supports only one • Stored in: Registry and system cache • Active Directory: Not required

  9. Domain-Based • Accessed via: \\Domain-name\DFSRoot • Can be: DC, Member server • Namespaces: Supports MULTIPLE • Stored in: Active Directory • Active Directory: Required

  10. DFS Replication • DFS replication is a multi-master replication service that maintains copies of shared files and folder on multiple servers throughout the organization. • The replication service is responsible for synchronizing files across replicas.

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