Figure 31. A local client mounting ®le systems from a remote server

Given the proper authority, an NFS client can mount any ®le system, or part of a ®le

Figure 32. The mounted ®le systems cover local client directories

system, that has been exported from an NFS server. Mounting is the local client action of selecting an exported directory from a remote server and making it accessible to the integrated ®le system namespace of the local client.

In many UNIX implementations of NFS, a user can list a remote ®le system in the /etc/fstab ®le on the client where it is automatically mounted after IPL. On AS/400

NFS implementation, however, there is a program that operates at IPL that is

typically used to start up various user-selectable system tasks. The name of this IPL-time startup program is stored in a system value called QSTRUPPGM The default

name of the program is QSTRUP, which is located in the QSYS library. Users can edit this program to include the ADDMFS (Add Mounted File System) or MOUNT commands that will automatically mount remote ®le systems during startup. It is recommended that you use the STRNFSSVR *ALL command before using any mount commands. Remote exported ®le systems can also be explicitly mounted at any time after IPL by clients with proper authority using the ADDMFS or MOUNT commands.

When ®le systems are mounted on the client, they will ªcover upº any ®le system, directories, or objects that exist beneath the mount point. This means that mounted ®le systems will also cause any ®le systems, directories, or objects that exist locally downstream from the mount point to become inaccessible.

40OS/400 Network File System Support V4R4

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IBM AS/400E manual Local client mounting le systems from a remote server
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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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