Multiple-Device Files

ation

to the ICF device, you do not need to modify

the value

aga

input

operation

completes successfully with a different

device.

 

¹ The

SAVEDS keyword indicates a data structure that is

saved and

re

each

device

acquired to a file. The SAVEIND keyword

indicates

a

tors to

be

saved and restored

for each device acquired to a f

operation, the

current

set of indicators

and

data

structure

are s

input

operation,

the RPG compiler

restores

the

indicators

and

data

the

device

associated

with the operation. This may be

a differe

tors

or

data

structure

than was

available

before

the

input

operati

¹The INFDS keyword specifies the file information data structure for

WORKSTN file. The RPG *STATUS

field and

the major/minor return code for

the I/O operation can

be

accessed

through this data structure. P

when ICF is being used, both fields

are useful for detecting err

during I/O operations

to multiple-device files.

Note: When specifying these control options, you must code the MAXDEV option before the DEVID, SAVEIND or SAVEDS options.

344 ILE RPG for AS/400 Programmer's Guide

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IBM AS/400 manual Multiple-Device Files
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AS/400 specifications

The IBM AS/400, now known as the IBM iSeries, is a midrange computer system that has been a cornerstone of enterprise computing since its introduction in 1988. Designed to provide a robust platform for business applications, the AS/400 is celebrated for its reliability, scalability, and integrated database capabilities.

One of the key features of the AS/400 is its Integrated Operating Environment, which blends hardware and software resources seamlessly. This integration allows businesses to execute diverse workloads, ranging from traditional applications to modern web-based services, all on a single platform. The operating system, OS/400 (now IBM i), offers a rich set of APIs and tools for developers, simplifying application development and management.

Another standout characteristic of the AS/400 is its built-in database, DB2 for i. This powerful relational database management system allows for efficient data handling and provides advanced features such as support for SQL, XML, and JSON, making it easier for businesses to manage their data and integrate it with other systems. The database's tight integration with the operating system enables high performance and security.

In terms of scalability, the AS/400 can accommodate small businesses as well as large enterprises, with the ability to support hundreds of users simultaneously. Its architecture allows for easy upgrades in hardware, meaning that organizations can scale their systems without replacing the entire infrastructure.

Security is another critical attribute of the AS/400. With a sophisticated security model, it offers built-in user authentication, access control, encryption, and auditing capabilities to protect data and applications from unauthorized access.

The AS/400 also supports multiple programming languages, including RPG, COBOL, Java, and PHP, giving organizations the flexibility to choose the development tools that best fit their needs. This diversity helps maintain legacy applications while also developing new ones that leverage modern technologies.

Moreover, the platform supports both traditional green-screen interfaces and modern graphical user interfaces, allowing organizations to transition smoothly into contemporary user experience paradigms.

Overall, the IBM AS/400 stands out as a resilient, flexible, and secure computing platform that enables organizations to effectively manage their business operations, streamline processes, and adapt to changing market demands. Its unique combination of integrated features and capabilities ensures that it remains relevant in today's fast-paced technology landscape.
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