11.2, ªInstalling and Configuring PSF/MVSº

11.3, ªSetting up AFP Resourcesº on page 240

11.3.4, ªMigrating Print Applicationsº on page 241

11.4, ªUnderstanding Operational Differencesº on page 242

11.5, ªOther Differencesº on page 243

Other tasks are similar between the two platforms.

11.2 Installing and Configuring PSF/MVS

PSF/MVS is an optional feature of OS/390, and is already installed on your

SystemPac or part of your ServerPac. If you are already licensed for Print

Services Facility/MVS (PSF/MVS), 5695-040, you must explicitly enable it.

If you order the product with OS/390, the tailored IFAPRD00 member that IBM ships with your order contains the required PRODUCT statements. Otherwise, you must explicitly enable the licensed program when you run it with OS/390.

The following example shows the entry that you must include in the IFAPRDxx parmlib member to enable PSF/MVS:

PRODUCT OWNER(′ IBM CORP′ )

NAME(PSF/MVS)

ID(5695-040)

VERSION(*) RELEASE(*) MOD(*)

FEATURENAME(PSF/MVS)

STATE(ENABLED)

This should already be enabled with your ServerPac or SystemPac.

11.2.1 Defining Channel-attached Printers to MVS

This is similar to VSE. Use IOCP as described in Chapter 2 of the PSF/MVS Systems Programmers Guide to define parallel or ESCON channel-attached printers.

11.2.1.1 Attachment Options

PSF/MVS supports printers as system output devices for deferred printing through JES2, or for direct printing under Direct Printer Services Subsystem (DPSS). This way, the application program sends records directly to an attached printer (or directly to PSF), bypassing the JES spool. See Chapter 8 in the PSF/MVS Systems Programmers Guide for details.

11.2.2Defining Network Printers

11.2.2.1SNA-Attached Printers

This is similar to VSE. See Chapter 3 in the PSF/MVS Systems Programmers

Guide for details.

236VSE to OS/390 Migration Workbook

Page 260
Image 260
IBM OS/390 manual Installing and Configuring PSF/MVS, Defining Channel-attached Printers to MVS, Defining Network Printers

OS/390 specifications

IBM OS/390, a versatile operating system, was a cornerstone in enterprise environments and played a pivotal role in mainframe computing. Released in the mid-1990s, OS/390 combined the strengths of IBM's MVS (Multiple Virtual Storage) with new features and enhancements, targeting scalability, reliability, and performance in demanding business applications.

One of the key features of OS/390 was its robust support for multiple users and processes. The system allowed thousands of concurrent users to access applications and data, ensuring high availability and minimizing downtime—a critical requirement for many large organizations. This scalability was supported through various enhancements in memory management and processor scheduling, enabling optimal resource allocation across diverse workloads.

OS/390 was known for its superior workload management capabilities. The Workload Manager (WLM) component allowed administrators to define service policies, specifying how system resources would be allocated according to the priority of tasks. This ensured that critical business processes received the necessary resources while less critical tasks were managed more flexibly.

Another significant characteristic of OS/390 was its commitment to security. The operating system provided comprehensive security features, including user authentication, data encryption, and auditing capabilities. This focus on security was vital for organizations handling sensitive data, ensuring compliance with regulations and safeguarding against unauthorized access.

OS/390 also supported advanced technologies that facilitated integration and development. The system included features like the IBM CICS (Customer Information Control System) for transaction processing and IMS (Information Management System) for database management. These technologies allowed organizations to build robust, high-performance applications tailored to specific business needs.

The ease of network integration was another strength of OS/390. With the advent of the Internet and global connectivity, OS/390 systems could easily interface with various network protocols, enabling businesses to operate in a connected world. This inclusion paved the way for many organizations to expand their capabilities and offer new services, driving digital transformation.

In conclusion, IBM OS/390 represented a significant advancement in mainframe technology, combining scalability, security, and robust workload management. Its rich feature set and support for critical enterprise applications solidified its role as a vital component of many organizations' IT infrastructures, ensuring they could meet their operational challenges head-on while supporting future growth. As technology continues to evolve, the legacy of OS/390 remains influential in the realm of computing.