Other MVS Names

There are many other objects which require naming in OS/390. Here is just a sample:

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Users (TSO, online, batch, operators) Job names

Job step names

JCL procedure names and proclibs Application program names

WLM service classes

WLM resource environments

25.4.1.3 JCL Standards

You should set up JCL (job control language) standards for your batch jobs, as well as started tasks and TSO logon procedures. Here is a partial list of some of the attributes to include in your JCL rules:

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Job Attributes

￿Job names

￿Accounting information

￿Job classes

￿MSGCLASS and MSGLEVEL

￿Specification of USER, GROUP, SECLABEL, and PASSWORD

￿Use of JOBCATs, JOBLIBs

￿Estimated lines, bytes, pages, and cards

￿Use of PRTY, PERFORM, REGION, TIME parameters

￿Job restart options

￿Use of commands in the jobstream

Step Attributes

￿Job step names

￿Use of ACCT, DPRTY, PERFORM, REGION, TIME parameters

￿Use of STEPLIBs and STEPCATs

Data Set Attributes

￿Unit names

￿GDGs

￿Tape standard labels

￿DASD space units and parameters

￿Output classes and printer attributes

￿Output routing destinations

25.4.2 Systems Management Procedures

In general, you can use many of the same processes that you are currently using. There are tools and products specific to OS/390 such as SystemView, TME 10, and INFO/MAN. Many products that work with VSE also work on OS/390.

This section addresses some of the basic elements associated with good management practices of running a system. See Chapter 30, ªSystems Management Philosophy and Methodologyº on page 457 for a more complete discussion.

Chapter 25. Prepare the Migration Environment

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IBM OS/390 manual Systems Management Procedures, JCL Standards, 409, Other MVS Names
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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.
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