Table 1 (Page 2 of 3). Comparison of VSE Functions & Components to OS/390 Replacements

VSE

OS/390

Comment and Reference

 

 

 

Languages

Languages

See Part 3 page 247

LE/VSE

LE/MVS *

Chapter

17 page 351

H L A S M

H L A S M *

Chapter

13 page 267

COBOL

COBOL

Chapter 12 page 249

PL/I

PL/I

Chapter

15 page 333

RPG II

RPG II

Chapter

14 page 329

REXX

REXX

Chapter 18 page 369

FORTRAN

FORTRAN

Chapter 16 page 349

C

C / C + + *

 

 

 

 

 

 

AFP Family

AFP Family

See Chapter

11 page 235

PSF/VSE

PSF/MVS

 

 

PPFA

PPFA

 

 

OGL

OGL

 

 

Font Libraries

Font Libraries

 

 

...

...

 

 

 

 

 

Network Management

eNetwork Comm. Server

See Chapter 9 page 185

VTAM (APPC, APPN)

VTAM (APPC, APPN) *

 

 

NCP

NCP *

 

 

BTAM/ES

BTAM/SP

 

 

TCP/IP

TCP/IP *

 

 

LANRES

LANRES *

 

 

MQSeries

MQSeries

 

 

NetView - CSF

NetView

 

 

 

 

 

 

CICS/VSE

CICS Transaction Server

See Chapter

6 page 133

CallPath

CallPath

 

 

DISOSS

DISOSS

 

 

...

...

 

 

 

 

 

Console Management

Console Management

See Chapter 28 page 443

OCCF

MCS & MPF*

 

 

Console Automation

SDSF *

 

 

(ISV)

NetView AOC

 

 

 

NetView

 

 

 

 

 

Systems Management

Systems Management

See Chapter 30 page 457

MSHP

SMP/E *

TSO/ISPF Panels do not

provide the JCL

DSNX

NetView D M

generation function of the

Interactive Interface

TSO/ISPF panels *

Interactive Interface

Explore (ISV)

RMF *

 

 

VSE/PT

RMF *

 

 

OMEGAMON (ISV)

RMF *

 

 

 

 

 

 

Development Environment

Development Environment

See Chapter

7 page 155

ICCF

TSO/E *

and Chapter

27 page 437

 

 

CMS

ISPF/PDF/SCLM *

 

 

 

 

 

 

Programming Library Mgmt:

ISPF Functions:

See Chapter

22 page 389

VSE Librarian,

DM, PDF, LMF, SCLM *

 

 

Panvalet (ISV)

DM, PDF, LMF, SCLM *

 

 

 

 

 

 

Security Manager

Security Server

 

 

ACLR

RACF *

 

 

ALERT (ISV)

RACF *

 

 

 

 

 

 

Disk Management

DFSMS Family *

See Chapter

24 page 397

ICKDSF

ICKDSF *

 

 

VSAM

DFSMSdfp (VSAM) *

 

 

Dump/Restore/Fcopy

DFSMSdss *

 

 

CA-Dynam/D (ISV)

DFSMShsm *

 

 

 

 

 

 

Tape Manager

DFSMS Family *

 

 

CA-Dynam/T (ISV)

DFSMSrmm *

 

 

 

 

 

 

Chapter 2. Sizing the Effort

17

Page 41
Image 41
IBM OS/390 Le/Vse Le/Mvs, A S M, Cobol PL/I, Rpg, Rexx Fortran, PSF/VSE PSF/MVS Ppfa OGL, Cics/Vse, Disoss, Occf MCS & MPF

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.