10.4.3.1

Queue Management Commands

 

Table 24.

Queue Management Commands

 

 

 

 

 

 

POWER

 

PWR

Function

JES2

Command

Short

 

Command

Code

 

Form

 

Verb

 

 

 

 

 

PALTER

 

A

Alter processing attributes of a POWER job or a

$T

 

 

 

POWER controlled partition

 

 

 

 

 

 

PDELETE

 

L

Delete queue entries

$P

 

 

 

 

PDISPLAY

D

Display the status of jobs, messages, resources,

$D

 

 

 

and the network

 

 

 

 

 

 

PHOLD

 

H

Put a job of a queue in hold/leave state

$H

 

 

 

 

POFFLOAD

O

Save or restore entries of a queue.

$S OFF

 

 

 

 

PRELEASE

R

Release a POWER job for further processing

$A

 

 

 

 

 

10.4.3.2 Task Management Commands

Table 25. Task Management Commands

POWER

PWR

Function

JES2

Command

Short

 

Command

Code

Form

 

Verb

 

 

 

 

PACT

 

Activate a transmitter or a receiver.

$S

 

 

 

 

PCANCEL

C

Cancel a POWER status report or a job in

$C

 

 

execution.

 

 

 

 

 

PDRAIN

N

Discontinue transmission or reception of jobs and

$P

 

 

or output by a given task.

 

 

 

 

 

PEND

 

Terminate POWER option.

$P

 

 

 

 

PFLUSH

F

Terminate the work currently in process for a

$C

 

 

task and allow the task to continue with

 

 

 

subsequent work

 

 

 

 

 

PGO

G

Reactivate a task or partition.

$S

 

 

 

 

PRESTART

T

Restart a writer task.

$B, $N

 

 

 

 

PSTART

S

Place a partition under control of POWER, start a

$S

 

 

task, or initiate a session between two nodes.

 

 

 

 

 

PSTOP

P

Release a partition from POWER, stop a task, or

$P

 

 

end a link or session between two nodes.

 

 

 

 

 

232VSE to OS/390 Migration Workbook

Page 256
Image 256
IBM OS/390 manual Task Management Commands, Command Short Code Form Verb

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.