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distributed file system (DFS)

Distributed file systems belong to the network file systems and allow access to files stored in file servers. With them, the administrator can build a single, network-wide file system. Such a file system can contain the various shares for the individual servers.

Overview of Distributed File Systems

Distributed file systems support mirroring, replication, and backup ofdata and files to hard disks and tape drives. In addition, user access rights to specific directories can be assigned in a dedicated manner. This allows the respective user to edit his files, delete them or save changes.

There are various distributed file systems that differ in application, by interface and protocol, and by various functionalities such as caching, journaling, multipathing, and use in local area networks. Among the better known distributed file systems are the Distributed File System (DFS), Andrew File System (AFS) and the Network File System (NFS). Furthermore, the Server Message Block (SMB) and the further development of the Common Internet File System (CIFS) as well as the Direct Access File System (DAFS) should be mentioned.

Since the data throughput of distributed file systems for clusters is extremely low, there are special cluster file systems with transfer rates of over 100 MB/s for these applications. These include the Global File System (GFS) and the proprietary General Parallel File System (GPFS).

The Distributed File System (DFS)

The Distributed File System (DFS) is hierarchically structured and has a uniform, logical naming convention. It is a network protocol that allows users to access files without knowing the location of the server. The central tree structure thus makes it easier to search for files throughout the company. These are stored redundantly and are fully available even if a primary hard disk fails.

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Englisch: distributed file system - DFS
Updated at: 04.05.2018
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