RMTBSC and SNA RJE Workstations

R(nn).RD(n) RJE Workstation Readers

R(nn).PR(n) RJE Workstation Printers

R(nn).PU(n) RJE Workstation Punches

See Table 19 on page 228, and Table 20 on page 229 for a comparison of

POWER PRMT macros and JES2 RMT parameters.

10.3.6.3 RJE Operations

See 28.6.1, ªJES2 RJE Operationsº on page452 and JES2 Commands for a description of RJE commands for the host and remote operators.

10.3.6.4 RJE Exits

JES2 exits 17 or 18 can be used to control RJE remote sessions when they sign on. Exits 1 and 15 can be used for separators on remote printers. See Table 23 on page 231 for a comparison of POWER exits and JES2 exits.

10.3.7 Network Job Entry

Note

For a complete discussion of NJE differences, please see NJE Installation,

Operation and Use with JES2 and Other Systems, GG22-9339.

NJE is supported by VSE/POWER, MVS/JES2, JES3, VM/RSCS, and some non-IBM program offerings. In general, all levels of VSE/POWER and JES2 are NJE-compatible with one another.

Both POWER and JES2 support SNA, BSC and CTC communications, although POWER only supports Virtual CTCs (using VM). Both systems support multiple streams, spanned headers, and AFP mode print files. JES2 also supports the following features which help manage NJE networks:

Path Manager

This is exclusive to JES2 and dynamically keeps track of

 

all connections, manages the best path and alternate

 

paths to all nodes in the network.

Parallel Links

You can have multiple parallel BSC lines, CTC

 

connections and SNA sessions with adjacent NJE nodes

 

for better availability and performance.

Multiple Paths

Alternate path routing and multiple concurrent paths are

 

supported by JES2 to adjacent and non-adjacent nodes.

Subnets

You can define subsets of the NJE nodes as ²Subnets²

 

for routing purposes to simplify routing tables and path

 

management.

Formatted Commands

The JES2 $G commands allow you display and control

 

jobs at other nodes in a system-independent format.

 

(You don¢t have to know the syntax of the target

 

system.)

See Chapter 5 in the JES2 Initialization and Tuning Guide for more details.

220VSE to OS/390 Migration Workbook

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IBM OS/390 manual Network Job Entry, RJE Operations, RJE Exits

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.