/XRL/6

 

169

Chapter

8, Databases

 

 

18, 18, 366

DLIUTIL

2043CH08

 

 

 

173

8.1.6, Utilities

 

 

176

TELECOM

2043CH09

 

 

 

185

Chapter

9, Telecommunications Subsystems

 

 

17, 17

AVTAM

2043CH09

 

 

 

185

9.1, ACF/VTAM

 

 

185

H2043A1

2043CH09

 

 

 

186

9.1.1.1,

VTAM Data Sets

 

 

186

H2043A2

2043CH09

 

 

 

192

9.2, ACF/NCP

 

 

185, 190

TBTAM

2043CH09

 

 

 

193

9.3, BTAM

 

 

185

TCPIP

2043CH09

 

 

 

193

9.4, Migrating TCP/IP

 

 

185

MSERIES

2043CH09

 

 

 

197

9.5, MQSeries

 

 

185

PWRJES

2043CH10

 

 

 

207

Chapter

10, POWER and JES2

 

 

73

KEEPJOB

2043CH10

 

 

 

207

10.1.1.1, KEEP Disposition for Pre-Execution Jobs

 

 

213

TPSPL

2043CH10

 

 

 

208

10.1.1.3,

Tape Spooling

 

 

215, 216

PSETUP

2043CH10

 

 

 

208

10.1.1.4, Printer Forms Alignment via PSETUP

 

 

215, 217, 233

SEPAGE

2043CH10

 

 

 

208

10.1.1.5,

Separator Page Difference

 

 

215, 217

EOPAGE

2043CH10

 

 

 

209

10.1.1.6, End-of-page Sensing

 

 

216, 217

J2PROC

2043CH10

 

 

 

211

10.2.2.1,

The JES2 Procedure

J2CUST

2043CH10

 

 

 

211

10.2.3, Tailoring JES2

JOBDISP

2043CH10

 

 

 

213

10.3.3.1,

Job Stream Disposition

 

 

213

DJC

2043CH10

 

 

 

214

10.3.3.2,

Serializing Job Execution

OUTDEV

2043CH10

 

 

 

216

10.3.4.1,

Printers Supported

 

 

215

OUTDISP

2043CH10

 

 

 

217

10.3.4.7,

Output Disposition

 

 

215

FCB1

2043CH10

 

 

 

217

10.3.4.8,

FCB Naming Differences

 

 

209, 215

UCS1

2043CH10

 

 

 

218

10.3.4.9,

UCS Naming Conventions

 

 

215

JIRJE

2043CH10

 

 

 

219

10.3.6.2,

Remote Workstation Definitions

 

 

212

JINJE

2043CH10

 

 

 

221

10.3.7.1,

NJE Definitions

 

 

212, 221

CTLSPL

2043CH10

 

 

 

221

10.3.8.2,

Programmable Spool Interfaces

J2PARM

2043CH10

 

 

 

225

10.4, POWER/JES2 Detailed Comparisons

PWRJ2I

2043CH10

 

 

 

225

10.4.1, Mapping POWER Parameters to JES2 Init Parms

JICMPCT

2043CH10

 

 

 

230

10.4.1.6,

Define Compaction Tables

PJXIT

2043CH10

 

 

 

230

10.4.2, Exit Comparisons

 

 

211

PJCMDS

2043CH10

 

 

 

231

10.4.3, POWER-JES2 Command Equivalences

 

 

211

Page 652
Image 652
IBM OS/390 manual XRL/6

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.