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IBM OS/390 manual Prepare the Migration Environment, 401

Models: OS/390

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Chapter 25. Prepare the Migration Environment

25.1 Introduction

Setting up the OS/390 environment, similar to setting up the VSE environment, involves installing the prerequisite hardware and software, and tailoring the system for your environment. As an example, we can describe it with the following steps:

1.Install and configure the required hardware.

2.Order and receive the OS/390 software along with all desired features, corequisite products, publications and so on.

3.Install the OS/390 software. For first time users of OS/390, we recommend that you install using SystemPac along with on-site services or other installation offerings. There are several services that provide more assistance such as SoftwareXcel Installation Express (SIE) in the United States.

4.Establish an inter-systems communication mechanism between your existing VSE system and the new OS/390 system for migrating and sharing data, programs and resources.

5.Set up your documentation, standards, operating procedures, training, and systems management mechanisms to manage and maintain the system.

6.Customize the OS/390 operating system, and necessary subsystems such as DFSMS, JES2, VTAM, RACF, and CICS. (Much of this may be done as part of the SIE installation.)

The following OS/390 documentation will help you get started:

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OS/390 Introduction and Release Guide, GC28-1725OS/390 Planning for Installation, GC28-1726

OS/390 MVS Hardware Configuration Definition (HCD) Planning, GC28-1750OS/390 Software Management Cookbook, SG24-4775

SystemPac, SIE, or ServerPac documentation.

In addition, here′s a list of DFSMS manuals that can be used for implementing SMS:

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DFSMS/MVS General Information, GC26-4900DFSMS/MVS Planning for Installation, SC26-4919Implementing System-Managed Storage, SC26-3123

See OS/390 Information Roadmap, GC28-1727, and Appendix E, ªRelated Publicationsº on page 557 for a list of other documents.

OS/390 education for the systems programming staff is critical to the success of this installation. See IBM Education and Training′s OS/390 course curricula for your area. Contact your IBM Representative or their Web site at the following URL:

http://www.training.ibm.com/ibmedu/roadmaps/mainframe/os390/.

© Copyright IBM Corp. 1998

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IBM OS/390 manual Prepare the Migration Environment, 401
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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.