Table 17

(Page 1 of 2). POWER Macro to JES2 Parameter Mapping

 

 

 

 

 

POWER

 

Description

JES2 Parm

Comment or

Parm

 

 

 

Recommendation

 

 

 

 

 

ACCOUNT

 

Job Accounting Information

JOBCLASS

SMF records are collected

 

 

to be collected/recorded.

TYPE6,

based on SYS(TYPE(nn:nn))

 

 

 

TYPE26

parm in

 

 

 

 

PARMLIB(SMFPRMxx)

 

 

 

 

 

CLRPRT

 

Clear 3800 page buffer at

N/A

Option not supported by

 

 

EOJ

 

JES2.

 

 

 

 

 

COPYSEP

 

Produce separator pages (or

PRT

JES2 exit 15 required to

 

 

cards) between data sets

SEPDS

write the separator pages

 

 

and copies.

 

(or cards).

 

 

 

 

 

DBLK

 

Size of data block

SPOOLDEF

Use the maximum (3992)

 

 

transferred to tape and disk

BUFSIZE

 

 

 

 

 

 

DBLKGP

 

Number of DBLKs allocated

SPOOLDEF

Default is 30

 

 

as a group.

TGSIZE

 

 

 

 

 

 

FEED

 

Eject and feed a new

N/A

Not supported in JES2

 

 

diskette at EOF

 

 

 

 

 

 

 

JLOG

 

Display job-related

N/A

Use MPF exits to suppress

 

 

messages on the console.

 

specific JES2 messages

 

 

 

 

 

JOBEXIT

 

User-written exit for JCL &

EXIT(2)

For the JOB (2) other JCL &

 

 

JECL

EXIT(4)

JECL (4) statements

 

 

 

 

 

JSEP

 

Extra separator pages or

N/A

Use JES2 Exits 1 & 15 to

 

 

cards between job output

 

insert extra pages or cards.

 

 

 

 

 

LTAB

 

Logical Carriage Control

N/A

Function not in JES2

 

 

Tape (FCB)

 

 

 

 

 

 

 

MEMTYPE

 

Support SLI

N/A

Function not in JES2

 

 

 

 

 

MRKFRM

 

Use mark-form on 3800s

PRT

(Only supported for FSS

 

 

between job output

COPYMARK

printers)

 

 

 

 

 

MPWD

 

Master password

N/A

 

 

 

 

 

 

MULT12

 

Multiple channel 12 postings

N/A

Function not in JES2

 

 

on FCBs

 

 

 

 

 

 

 

NETEXIT

 

User-written exit for input

EXIT(47)

Scan the NJE headers (not

 

 

from NJE node

 

for data records)

 

 

 

 

 

NTFYMSG

 

Maximum number of

N/A

No limits in JES2

 

 

messages held for ICCF

 

 

 

 

notification

 

 

 

 

 

 

 

OUTEXIT

 

User-written exit for output

EXIT(1)

Job output group separator

 

 

to printer or punch

EXIT(15)

(1), or data set separator

 

 

 

 

(15) (No exit is available for

 

 

 

 

processing SYSOUT data

 

 

 

 

records.)

 

 

 

 

 

PAUSE

 

Pause between each job

PUN(nn)

Use $S command to

 

 

output to a punch

PAUSE

continue.

 

 

 

 

 

PNET

 

Include networking function

N/A

Automatically included with

 

 

(phasename)

 

JES2

 

 

 

 

 

PRI

 

Default job priority

JOBPRTY(n)

Job Priority based on

 

 

 

PRIORITY

estimated execution time.

 

 

 

 

(See also RDR PRIOINC

 

 

 

 

parameter and priority

 

 

 

 

aging.)

 

 

 

 

 

RBS

 

Automatic output

N/A

Controlled by SEGMENT=

 

 

segmentation

 

on the applications DD

 

 

 

 

Statement

 

 

 

 

 

RJEBSC

 

Support BSC RJE

N/A

JES2 always supports BSC

 

 

 

 

RJE

 

 

 

 

 

226VSE to OS/390 Migration Workbook

Page 250
Image 250
IBM OS/390 manual 1 of 2. Power Macro to JES2 Parameter Mapping

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.