&&OPTIONS 1100001

/LIB FULL ALL &&OPTIONS 0010001

/LOAD DTSPROCS

/OPTION NOPROMPT &&OPTIONS 0010001 /LIST 1 1 IEBUPDTE

&&IF &&RETCOD NE *READY &&GOTO TAG11

/PURGE IEBUPDTE

&&LABEL TAG11

/INPUT NOPROMPT DUMMY LINE /END

/SAVE IEBUPDTE

/EDIT IEBUPDTE NEXT

GET $$PUNCH TOP

DEL 1

LSYSIN NEXT DEL 2 REPEAT *

O XXXXX YYYYYYYYYYYYYYYYYYYYYYYYYYYYYY LUP SYSIN

NEXT

&&NOP C¢ YYYYYYYYYYYYYYYYYYYYYYYYYYYYYY¢ , LEVEL=00,SOURCE=0,

LUP SYSIN NEXT

&&NOP C¢ XXXXX¢ . / ADD NAME=¢ *

LUP SYSIN NEXT ZONE 19 55 &&NOP C¢² * G ZONE 1 72 LUP SYSIN NEXT &&LABEL ILOOP DUP

&&NOP C ¢ . / ADD NAME=¢ INCLUDE¢

&&NOP C ¢ , LEVEL=00,SOURCE=0,LIST=ALL²

NEXT

&&IF &&RETCOD NE INVALID &&GOTO -ILOOP I./ ENDUP

I $$DITTO EOJ

I/*

I/&

END

&&TYPE PLEASE SUBMIT IEBUPDTE FROM YOUR ICCF LIBRARY

The second method for migrating ICCF members to a PDS for TSO/E utilizes the ICCF utility DTSUTIL and an assembler program to change the output from DTSUTIL to a format acceptable to IEBUPDTE. Using the PUNCH command of the ICCF utility DTSUTIL with the PUNCTL option and SYSPCH assigned to tape, you can create a tape of selected ICCF members with imbedded ADD MEMBER and END OF MEMBER statements. These unblocked 81 byte records will become input to an assembler language program. This program will use the information from the ADD MEMBER statement to create IEBUPDTE control statements, will

166VSE to OS/390 Migration Workbook

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IBM OS/390 manual Options, Load Dtsprocs, Save Iebupdte Edit Iebupdte Next, Del, Nop C¢ Xxxxx¢ . / Add Name=¢

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.