Network File System Process Layout

A daemon is a process that performs continuous or system-wide functions, such as network control. NFS uses many different types of daemons to complete user requests.

A cache is a type of high-speed buffer storage that contains frequently accessed instructions and data. Caches are used to reduce the access time for this information. Caching is the act of writing data to a cache.

For information about NFS server daemons, see ªNetwork File System Server-Side Daemonsº on page 9. For information about NFS client daemons, see ªNetwork File System Client-Side Daemonsº on page 12. For information about client-side caches, see ªNFS Client-Side Cachesº on page 12 Detailed information about the NFS protocol can be found in ªNetwork File System Stack Descriptionº.

Figure 8. A breakdown of the NFS client/server protocol

Local processes that are known as daemons are required on both the client and the server. These daemons process both local and remote requests and handle client/server communication. Both the NFS client and server have a set of daemons that carry out user tasks. In addition, the NFS client also has data caches that store speci®c types of data locally on the on the client. For more information about the NFS client data caches, see ªNFS Client-Side Cachesº on page 12.

Network File System Stack Description

Simple low-end protocols make up a high-end complex protocol like NFS. For an NFS client command to connect with the server, it must ®rst use the Remote Procedure Call (RPC) protocol. The request is encoded into External Data

8OS/400 Network File System Support V4R4

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.

IBM AS/400E manual Network File System Process Layout, Network File System Stack Description

Models: AS/400E