MVS Commands, 28.5.1.2 JES2 Commands, Sdsf Panels

28.5.1.1 MVS Commands

Use the DISPLAY JOBS, J, A, or TS command to display information about current system activity, including time-sharing users, batch jobs, and started tasks. The MVS ²TRACK² and ²MONITOR² commands also provide assistance with periodic updated displays in a display area.

28.5.1.2 JES2 Commands

There are many JES2 commands to display the work on your system:

$DA Use the $DA command to display information about active jobs, started tasks, and time-sharing users. This also shows jobs active on JES2 devices such as printers.

$DN Use the $DN command with various filters (Q=, V=, R=) to display jobs in specific phases of JES2 processing, on specific spool volumes, or with specified route-codes.

$DJ Use the $DJ, $DS, or $DT commands to display information about jobs, started tasks, or time-sharing users, known to JES2 on any queue, active or not.

$DJQ The $DJOBQ command is even more powerful with many different filters including wild-card characters to display information about jobs known to JES2.

There are many JES2 commands to control this work such as $C (cancel), $H (hold), $T (modify), $P (purge), and $E (restart).

28.5.1.3 SDSF Panels

There are four basic panels in SDSF to show active jobs:

ST Status of all jobs known to JES2, along with many characteristics such as amount of spool space being used.

DA Display of all Active jobs, started tasks and time sharing users, along with ASID, and RMF information about CPU, storage, and I/O rates.

IInput queue display of all jobs waiting for execution. This a good way to see what your backlog is for initiators.

OOutput queue display to show all job output elements waiting to be printed or punched, or transmitted to another or remote node.

HHeld output display to show all output elements that are held waiting for TSO output.

Each of these panels provide simple action commands to control the work such as A=Release, C=Cancel, D=Display, E=Restart, H=Hold, I=Info, J=Start, L=List, O=Release, P=Purge, Q=Outdesc, S=Browse, and X=Print .

28.5.1.4 RMF and Other Monitors

There are other facilities to monitor your work in the system such as the RMF Monitor II Address Space Reports.

450VSE to OS/390 Migration Workbook

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 MVS Commands, 28.5.1.2 JES2 Commands, Sdsf Panels, RMF and Other Monitors

Models: OS/390