IBM OS/390 User Manual

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Network Job Entry (NJE)

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Application Programming Interfaces

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Accounting

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RAS Characteristics

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Testing Techniques

The comparison is based on the functions provided within VSE/POWER.

Therefore, it is not a complete overview of all functions available in JES2.

In POWER, the Spool File can be shared between multiple VSE/POWER systems
using the “Shared Spool” feature. 

Multi-access spool or MAS is a standard

feature of JES2. Even in a single system environment, JES2 assumes there are
multiple systems (called 

members) sharing spool and checkpoint.

JES2 allows a maximum of 32 members in an MAS, compared with POWER
which allows only four. The JES2 members usually correspond to an MVS
system, but you can have multiple JES2 subsystems (members) on the same
MVS system.

Both VSE/POWER and OS/390 support the sharing of user files between multiple
systems with integrity. This is supported by Global Resource Serialization (GRS)
with OS/390. See 

OS/390 V1R3.0 MVS Planning - Global Resource Serialization,

GC28-1759 for details.

As with POWER, jobs may be submitted to JES2 from many sources. Here are
some comparisons:

Table 11. JES2 Input Sources (compared to POWER)

Local Card Reader

Y

Y

JES2 supports 2501, 2540,
3505 & 3525

Disk

Y (SLI)

Y

Use IEBGENER or IEBEDIT
(RDRxx proc)

Tape

Y

Y

Use IEBGENER or IEBEDIT
or RDRxx proc

3540 Diskette
Reader

Y

N

3540 Reader Utility no
longer supported

Remote BSC & SNA
Terminal

Y

Y

See 10.3.6.2, “Remote
Workstation Definitions” on
page 219 

Submit Function

Y (ICCF)

Y

TSO/E See 7.4, “Submitting
Jobs for Batch Execution”
on page 162 

Internal Reader

Y

Y

/ /   D D   S Y S O U T =

(x,INTRDR)

NJE Nodes

Y

Y

See 10.3.7.1, “NJE
Definitions” on page 221 

VSE to OS/390 Migration Workbook