IBM Cobol & Cics Ccca, Idcams Iebcopy Iebgener

HLL programming interfaces 242 host operations 452

I/O error checking 294

IBM

COBOL & CICS CCCA 522

COBOL compilers - comparison 250 Global Services 519 OPTI-AUDIT for VSE 520

ICCF 155 /CMS/TSO 218 & TSO 155

command procedures 163 library conversion 163 LOGON procedures 157 macros 167 procedures 167 program execution 161 security 157

users′ orientation 437 ICETOOL 380 ICFCATALOG 112 ICKDSF 23

ICVR 142

IDCAMS 455

IEBCOPY 455

IEBGENER 455

IEBxxx or IEHxxx 455

IEFBR14 78

IF statement 84

IF THEN ELSE ENDIF statements 84 IKQVCHK - catalog check 125 IKQVDU - volume cleanup 124 image 9

imbedding JCL 72 IMF 171 implementation phases 515

converting development material 516 Phase 6: actual conversion & switchover

final JCL conversion 516 final program conversion 517

Phase 7: initial OS/390 operations 518 switchover

additional tasks 518 data/file migration 517

implementing DFSMS 102 implementing JES2 209

setting up required resources JES2 checkpoint 210 JES2 spool volumes 210

starting JES2

JES2 Procedure 211 tailoring JES2

JES2 initialization parameters 211 JES2 installation exits 211

JES2 operator commands 211 multiple system support 211

implementing system security 410 implicit DEFINE 123 IMPRECISE 337

IMS/VS DB & DL/I differences 169

IMSCOMP parameter 16

in-house staff 29

in-place migration 35

Independent Software Vendor products 417 index creation 173

indexed sequential file definition 326 indexed VTOC considerations (OS/390) 109 initial OS/390 operations 518 initialization parameters JES2 211 initialization testing 511

input service 212

INPUT-OUTPUT SECTION - I-O-CONTROL 255 installation

and customization - MQSeries 200 enforcing standards 410

exits 243

exits JES2 211 hardware 402 OS/390 fee-based 405 standards 407

installing & configuring PSF/MVS 236 defining channel-attached printers to MVS

attachment options 236 defining network printers

SNA-attached printers 236 TCP/IP attached printers 237

defining PSF printers 237

FSS procedure and PRINTDEV statements comparison of PRINTDEV statement

parameters 238

PSF startup procedures 237 instream data 73

instream data set input 74 integer date definition 573 Integrated Catalog Facility (ICF) 111

Integrated Communications Adapter (ICA) 188 inter-systems connectivity 404

Interactive Interface 151 Interactive Macro Facility (IMF) 171

interactive user interfaces (ICCF/CMS/TSO) 218 interchangeability of volumes 103, 108 interlanguage communications applications 358 interlanguage linkages 338

internal reader 73

internal side definition 573 Internet locations 245 INTERRUPT 337

interrupt handling routines 287 interval timer interrupts 287 intervention, operator 76

intra-region data set name sharing 128 introducing PSF/MVS

functional comparison printer features 235 printers supported 235

602VSE to OS/390 Migration Workbook

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 IBM Cobol & Cics Ccca, Idcams Iebcopy Iebgener

Models: OS/390

IBM