Project, Res/Nores, Racf, Rdo | IBM OS/390 specification

project (continued)			REALAD macro	290
plan s u m m a r y 56			reasons for migrating			4, 10
planning		37	reasons for migration			3
planning & orientation 494			recommendations		424
schedule		54	recommended settings for options 363
staffing		43	Reconcile/SRC	526
tasks	47		record 341
PRTOV macro 296			addressing	315
PSB 171			addressing by ID			315
PSETUP	208, 217		addressing by KEY			316
PSF			reference by ID		316

command comparison			242	reference by KEY			317
migrating resources			240	record level sharing (RLS)				129, 136
printer definitions		237		recovery example for COBOL 526
remote-resident resources 240				Recovery/SRC		526
starting and stopping			242	Redbooks	244, 408, 412
startup procedures 237				reference methods			316
supplied utilities		244		references	244
PSF/MVS				register conventions			269
accounting	244			related redbooks		408
differences	243			relative importance			546
exclusives	235			release 4 base elements				416
installation	236			release 4 optional features				416
installation exits		243		reloading database			176
introduction	235			RELPAG macro		290
performance	243			RELSE macro 300, 306
publications	244			remote

PSF/MVS operational differences							job entry		219
command comparison				242			operations management						452
starting and stopping PSF					242		operator command authority							453, 454
PSF/MVS references							resident resources					240
other sources 244							without consoles				453
PSF/MVS publications				244			workstation definitions						219, 229
PSF/VSE publications				244			workstation operations						452
redbooks		244					Rename/SRC		526
services		245					reorganization utilities					173
tools							repetitive conversion					488
	DITTO	244					REPORT	337
	internet locations			245			Report Controller API					135
	other utilities		244				Report Controller Feature (RCF)							151
	PSF supplied utilities				244		REPORT WRITER statements in DOS/VS COBOL
PSF/VSE and PSF/MVS functional comparison 235							programs		253
PSF/VSE publications			244				REPRO function			119
							required hardware				402
Q							required training			535
Q							RES/NORES		260
queue management commands						232	reserved word considerations for DOS/VS
							COBOL	263
R							reserved words			263
R							reserved words for DOS/VS COBOL 263
RACF	149, 158						reserved words for DOS/VS COBOL 263
RACF	149, 158						reserved words for VS COBOL II and COBOL for
RAS characteristics			224				reserved words for VS COBOL II and COBOL for
RAS characteristics			224				VSE/ESA		265
RCB/ENQ/DEQ macros				286			VSE/ESA		265
RCB/ENQ/DEQ macros				286			RESET statement				83
RCE (Read Column Eliminate)						339	RESET statement				83
RCE (Read Column Eliminate)						339	resources
RDO	144						resources
RDO	144						allocation		78
RDO considerations			143				allocation		78
RDO considerations			143				allocation at OPEN time						78
Read Column Eliminate				339			allocation at OPEN time						78
Read Column Eliminate				339			definition		187, 190
READ macro		307, 313					definition		187, 190
READ macro		307, 313					management			37
							management			37

Index 613

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.

IBM OS/390 manual Project, Res/Nores, Racf, Rdo

Models: OS/390

project (continued)

PSF

PSF/MVS

services

DITTO

RES/NORES

RACF

RDO

definition

Index 613

OS/390 specifications