Read/Write Options

No matter what options the client speci®es on the MOUNT command, some server ®le systems from QOpenSys exist as read-only or read-write. However the client mounts a ®le system determines how the ®le system is treated and how it functions on the client.

Library File System (QSYS.LIB)

Figure 49. The QSYS.LIB ®le system accessed through the NFS Server

Network File System Differences

 

Exporting and QSYS.LIB

 

You can export some .LIB and .FILE objects. If you export .SAVE ®les and a client

 

mounts them, then all attempts to open the ®les will fail. In general, you should

 

export only things that clients need access to.

 

All object types in the QSYS.LIB ®le system can be exported and mounted

 

successfully without error. All operations on exported and mounted ®le systems will

 

function as if the object existed locally on AS/400. For example, the only object

 

types in the QSYS.LIB ®le system that support all ®le input/output (I/O) operations

 

are database members (.MBR) and user spaces (.USRSPC).

If you export a QSYS.LIB ®le system directory and specify a network data ®le code

page, then OS/400 Network File System Support opens data ®les with the

O_TEXTDATA and O_CODEPAGE options.

Chapter 6. Using the Network File System with AS/400 File Systems 57

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IBM AS/400E manual Library File System QSYS.LIB, Exporting and QSYS.LIB
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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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