Network File System

74, 9, 10, 11, 12, 13, 14, 65,

66mdit

(continued)

 

 

 

 

 

 

 

byte-range locks

(continued)

 

 

 

 

statelessness

74

 

 

 

 

 

why should I lock a ®le?

74

 

 

 

caches

 

 

 

 

 

 

 

 

 

 

de®nition

8

 

 

 

 

 

 

 

client

8, 11, 77

 

 

 

 

 

 

 

block I/O daemon (BIOD)

12

 

 

 

caches

 

12

 

 

 

 

 

 

 

 

contents

11

 

 

 

 

 

 

 

daemons 12

 

 

 

 

 

 

 

data cache

14

 

 

 

 

 

 

directory and ®le attribute cache

13

 

client/server communication

7

 

 

 

client/server model

7

 

 

 

 

 

client/server relationship

7

 

 

 

 

daemons

 

 

 

 

 

 

 

 

 

 

de®nition

8

 

 

 

 

 

 

 

description

3

 

 

 

 

 

 

 

 

encoding

8

 

 

 

 

 

 

 

 

exporting ®le systems

25

 

 

 

 

integrated ®le system

77

 

 

 

 

introduction

1

 

 

 

 

 

 

 

mounting ®le systems

39

 

 

 

 

overview of functions

1

 

 

 

 

 

process layout

8

 

 

 

 

 

 

protocol

8

 

 

 

 

 

 

 

 

 

security considerations

 

 

 

 

 

introduction

81

 

 

 

 

 

 

server

8, 9

 

 

 

 

 

 

 

 

contents

9

 

 

 

 

 

 

 

mount daemon (MNTD)

10

 

 

 

network lock manager daemon (NLMD)

11

network status monitor daemon (NSMD)

11

NFS server daemons (NFSD)

10

 

 

RPC binder daemon (port mapper)

10

 

shutdown

 

 

 

 

 

 

 

 

 

 

implications

66

 

 

 

 

 

 

introduction

65

 

 

 

 

 

 

NFS client

70

 

 

 

 

 

 

NFS client scenario

70

 

 

 

 

NFS server

70

 

 

 

 

 

 

NFS server scenario

70

 

 

 

 

stack description

8

 

 

 

 

 

 

startup

 

 

 

 

 

 

 

 

 

 

implications

66

 

 

 

 

 

 

introduction

65

 

 

 

 

 

 

NFS client

67

 

 

 

 

 

 

NFS client scenario

67

 

 

 

 

NFS server

67

 

 

 

 

 

 

NFS server scenario

66

 

 

 

 

transmission

8

 

 

 

 

 

 

 

user-de®ned ®le system (UDFS)

15

 

using AS/400 ®le systems

55

 

 

 

Version 2

 

3

 

 

 

 

 

 

 

 

Version 3

 

3

 

 

 

 

 

 

 

 

what is NFS?

1

 

 

 

 

 

 

 

Network Lock Manager Daemon (NLMD)

 

 

byte-range locks

11

 

 

 

 

 

 

network lock manager daemon (NLMD)

 

byte-range locks

74

 

 

 

description

11

 

 

 

 

 

 

displaying

68, 71

 

 

 

 

order of shutdown

70

 

 

 

order of startup

 

68

 

 

 

 

network status monitor daemon (NSMD)

 

description

11

 

 

 

 

 

 

displaying

68, 71

 

 

 

 

Network Status Monitor Daemon (NSMD)

 

notify list

11

 

 

 

 

 

 

network status monitor daemon (NSMD)

 

order of shutdown

70

 

 

 

order of startup

 

68

 

 

 

 

NFS client

12

 

 

 

 

 

 

 

NFS Client

12

 

 

 

 

 

 

NFS client

13, 14

 

 

 

 

 

 

attribute cache

 

11

 

 

 

 

block I/O daemon (BIOD)

11, 12

 

caches

 

 

 

 

 

 

 

 

data cache

14

 

 

 

 

NFS Client

 

 

 

 

 

 

 

 

caches

 

 

 

 

 

 

 

 

introduction

 

12

 

 

 

 

NFS client

 

 

 

 

 

 

 

 

contents

11

 

 

 

 

 

 

daemon

 

 

 

 

 

 

 

 

description

12

 

 

 

 

data cache

11

 

 

 

 

 

 

description

11

 

 

 

 

 

 

directory and ®le attribute cache

 

descriptions

 

13

 

 

 

 

function

13

 

 

 

 

 

 

displaying daemon

71

 

 

 

mount command

11

 

 

 

network lock manager (NLM)

11

 

network status monitor (NSM)

11

 

RPC binder daemon (RPCD)

11

 

unmount command

11

 

 

 

NFS server

9

 

 

 

 

 

 

 

/etc/exports ®le

9

 

 

 

 

contents

9

 

 

 

 

 

 

 

daemons

 

 

 

 

 

 

 

 

description

9

 

 

 

 

description

9

 

 

 

 

 

 

export command

9

 

 

 

 

export table

9

 

 

 

 

 

 

how to display daemons

68

 

 

mount daemon (MNTD)

10

 

 

network lock manager daemon (NLMD)

11

network status monitor daemon (NSMD)

11

NFS server daemon (NFSD)

10

 

NFS server daemons 9

 

 

 

port mapper

10

 

 

 

 

RPC binder daemon (RPCD)

10

 

NFS server daemon (NFSD)

 

 

 

description

10

 

 

 

 

 

 

NFS Server Daemon (NFSD)

 

 

displaying

68

 

 

 

 

 

 

order of shutdown

70

 

 

 

order of startup

 

68

 

 

 

 

Index 109

Page 127
Image 127
IBM AS/400E manual 74, 9, 10, 11, 12, 13, 14

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.