Chapter 1. What is the Network File System?

Introduction

OS/400 Network File System Support introduces a system function for AS/400 that aids users and administrators who work with network applications and ®le systems. You can use the Network File System (NFS**) to construct a distributed network system where all users can access the data they need. Furthermore, the Network File System provides a method of transmitting data in a client/server relationship.

The Network File System makes remote objects stored in ®le systems appear to be local, as if they reside in the local host. With NFS, all the systems in a network can share a single set of ®les. This eliminates the need for duplicate ®le copies on every network system. Using NFS aids in the overall administration and management of users, systems, and data.

NFS gives users and administrators the ability to distribute data across a network by:

vExporting local ®le systems from a local server for access by remote clients. This allows centralized administration of ®le system information. Instead of duplicating common directories on every system, NFS shares a single copy of a directory with all the proper clients from a single server.

vMounting remote server ®le systems over local client directories. This allows AS/400 client systems to work with ®le systems that have been exported from a remote server. The mounted ®le systems will act and perform as if they exist on the local system.

The following ®gures show the process of a remote NFS server exporting directories to a local client. Once the client is aware of the exported directories, the client then mounts the directories over local directories. The remote server directories will now function locally on the client.

Figure 2. The local client and its view of the remote server before exporting data

Before the server exports information, the client does not know about the existence of ®le systems on the server. Furthermore, the client does not know about any of the ®le systems or objects on the server.

© Copyright IBM Corp. 1997, 1999

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IBM AS/400E manual What is the Network File System?, Introduction
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AS/400E specifications

The IBM AS/400E, now more commonly known as IBM i, is a robust and versatile midrange server that has been designed to provide a comprehensive computing solution for businesses of all sizes. First introduced in the late 1980s, the AS/400 series has undergone multiple enhancements and rebranding, with the AS/400E being one of the notable iterations. This powerful platform is closely associated with IBM's commitment to reliability, scalability, and integrated business solutions.

One of the main features of the AS/400E is its highly integrated architecture that combines hardware and software into a cohesive system. This integration allows for seamless operations, reducing the complexity typically associated with managing disparate systems. The system is powered by IBM's proprietary OS/400 operating system, which has evolved into IBM i, featuring advanced capabilities like object-oriented programming, integrated database management, and security features that are essential for enterprise environments.

A key characteristic of the AS/400E is its robust database support, primarily through the use of DB2 for i. This integrated database management system enables efficient data handling and retrieval, facilitating real-time business analytics and reporting. Furthermore, the platform supports a variety of programming languages, including RPG, COBOL, and Java, making it flexible for developers who require diverse tools for application development.

The AS/400E is also known for its exceptional reliability and uptime, making it a preferred choice for critical business applications in industries such as finance, healthcare, and manufacturing. This reliability is backed by advanced error detection and correction mechanisms, as well as redundancy features that help prevent data loss and minimize downtime.

In terms of scalability, the AS/400E can effortlessly expand to accommodate growing business demands. Organizations can increase processing power by adding more resources without significant disruption. This scalability, combined with the system’s built-in virtualization capabilities, allows businesses to optimize resource usage and streamline operations.

Security is another defining feature of the AS/400E. The platform incorporates various layers of security measures, including user authentication, encryption, and comprehensive auditing capabilities, ensuring that sensitive business data is protected against unauthorized access.

Overall, the IBM AS/400E remains a powerful tool in the enterprise computing landscape, providing businesses with an integrated, reliable, and secure solution for their technological needs. Its enduring popularity is a testament to its capability to evolve with changing business requirements while maintaining its core attributes of high performance and stability.
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