IBM OS/390 User Manual
POWER
|
JES2
┌──────────────┐ | ┌──────────────┐
│
│
│
│ Checkpoint
│─┐
│ Queue file
│
|
│
Data set
│ │
│
│
│ (Incl. Job & │ │
│
│ | │
Output Queue│ │
└──────────────┘ └──────────────┘ │
|
│ Duplex Copy
│
└──────────────┘
|
┌──────────────┐ | ┌──────────────┐
│ Data file
│ Data file
│
│ Spool files
│
│ up to 15
│
|
│ up to 253
│
│ extents
│
│ data sets
│
└──────────────┘ └──────────────┘
|
┌──────────────┐ | ┌─────────────────┐
│ Accounting
│ Accounting
│
│
SMF data sets │
│ File
│ | │
(part of MVS)
│
└──────────────┘ └─────────────────┘
Your starter OS/390 system has a small JES2 subsystem defined with a minimal
JES2 checkpoint and spool data sets. You will have to redefine them to support
your environment.
JES2 checkpoint and spool data sets. You will have to redefine them to support
your environment.
10.2.1.1 JES2 Checkpoint
Similar to the POWER Queue File (IJQFILE), JES2 uses the
″
Checkpoint
″
data
set(s) to manage its queues. Two JES2 checkpoint data sets should be allocated
on different volumes to contain a copy of the JES2 job and output queues and
information that must be retained across a JES2 restart. For details on the size,
placement, and specification, see Chapter 4 in the
on different volumes to contain a copy of the JES2 job and output queues and
information that must be retained across a JES2 restart. For details on the size,
placement, and specification, see Chapter 4 in the
OS/390 JES2 Initialization and
Tuning Guide.
10.2.1.2 JES2 Spool Volumes
One or more JES2 spool data sets must also be allocated to contain a copy of
job input and output, along with spooled control blocks for JES2. All spool data
sets must have the same data set name and reside on DASD volumes with serial
numbers starting with the same four or five characters as specified on the
SPOOLDEF parameters. All spool data sets must have the same names, so there
can only be one per volume and the volumes can not be DFSMS managed. For
the specific size, placement, and attribute specification, see Chapter 3 in the
OS/390 JES2 Initialization and Tuning Guide.
job input and output, along with spooled control blocks for JES2. All spool data
sets must have the same data set name and reside on DASD volumes with serial
numbers starting with the same four or five characters as specified on the
SPOOLDEF parameters. All spool data sets must have the same names, so there
can only be one per volume and the volumes can not be DFSMS managed. For
the specific size, placement, and attribute specification, see Chapter 3 in the
OS/390 JES2 Initialization and Tuning Guide.
10.2.2 Starting JES2
Similar to the startup options in VSE/POWER, you can start JES2 automatically at
IPL time, or the operator can enter the
IPL time, or the operator can enter the
″
S JES2
″
command.
There are also two types of startup: cold start, and warm start. As with POWER,
you must use the
you must use the
″
COLD
″
option when bringing up JES2 for the very first time, or
when restarting JES2 with incompatible init parms. Otherwise a warm start is
required to preserve the jobs and spooled data from before. There are other
required to preserve the jobs and spooled data from before. There are other
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VSE to OS/390 Migration Workbook