XRL/24 | IBM OS/390 manual

/XRL/24

		529	(1)	customer migration example
			(2)	environment
				529, 529, 530, 530
D340002	2043CH34
		531	(1)	customer migration example
			(2)	duration
				531, 531

			List Items

id	File	Page	References
TSK1	2043CH02
		26	1
				26
TSK2	2043CH02
		26	2
				26
TSK3	2043CH02
		26	3
				26
TSK4	2043CH02
		26	4
				26
TSK5	2043CH02
		27	5
				26
TSK6	2043CH02
		27	6
				26
TSK7	2043CH02
		27	7
				26
TSK8	2043CH02
		27	8
				26
TSK9	2043CH02
		27	9
				26
TSK10	2043CH02
		27	10
				26
TSK11	2043CH02
		27	11
				26
JANDS	2043CH04
		71	4
				78

			Footnotes

id	File	Page	References
FNR3	2043CH10
		222	6
				222, 222, 222
FNMICRO	2043CH11
		235	7
				235

Tables

File

Page

References

CCHART 2043CH02

16 1

WHOAFF 2043CH02

26 2

NINMAIN 2043CH03

54 3

CNVMAIN 2043CH03

54 4

XYZAFF2043CH03

55 5

OPRAFF 2043CH03

55 6

VSEJCL2043CH04

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 XRL/24

Models: OS/390

/XRL/24

Tables

File

References

OS/390 specifications