waits for requests (the standard is #2049). All server daemons will use this same port. The NFS server daemons then wait on the port for RPC requests from NFS clients to access local ®les.

4.The user starts the mount daemon (QNFSMNTD). This daemon registers to the local RPC binder daemon. It then waits on the assigned port for RPC requests from NFS clients to mount local ®le systems.

5.The user starts the NSM daemon (QNFSNSMD). It registers to the local RPC binder daemon. It then waits on the assigned port for RPC requests to monitor systems.

6.The user starts the NLM daemon (QNFSNLMD). It registers to the local RPC binder daemon. It then waits on the assigned port for RPC requests to manage locks.

If you specify *ALL for the SERVER parameter for the Start Network File System Server (STRNFSSVR) command will automatically start all the daemons in the correct order.

In a typical NFS client startup:

1.The user starts the RPC binder (port mapper) daemon, if it is not already operational. On a given system, a single port mapper is used for both client and server.

2.The user starts the block I/O daemon (QNFSBIOD) or daemons. This daemon controls the caching of data and attributes that have been transmitted from the server.

3.The user starts the NSM daemon, if it is not already operational. On a given system, a single NSM operates for both the client and server.

4.The user starts the NLM daemon, if it is not already operational. On a given system, a single NLM is used for both the client and server.

STRNFSSVR (Start Network File System Server) Command

Purpose

The Start Network File System Server (STRNFSSVR) command starts one or all of the Network File System (NFS) server daemons.

You should use the SERVER(*ALL) option, which will start the daemons in the following order, as well as call the export command. This order is the recommended order for starting the Network File System.

vThe Remote Procedure Call (RPC) binder daemon

vThe block I/O (BIO) daemon

vcall the export command

vThe server (SVR) daemon

vThe mount (MNT) daemon

vThe network status monitor (NSM) daemon

vThe network lock manager (NLM) daemon

If you are choosing to start just one daemon, be sure you understand the appropriate order for starting NFS daemons and the possible consequences of starting deamons in an order other than that speci®ed above.

Chapter 7. NFS Startup, Shutdown, and Recovery 67

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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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