This document contains special considerations that refer to Natural in batch mode under the operating system z/OS.
The following topics are covered:
For considerations that refer to Natural in batch mode generally, see also:
The Natural z/OS batch mode interface NATOS consists of a
number of service routines interfacing with the z/OS operating system.
NATOS is supplied as a source module and can be customized
to meet your requirements; see also Installing Natural under
z/OS. You can either assemble and link NATOS
to the Natural nucleus or you can run it separately, connecting with a shared
nucleus.
NATOS is fully reentrant and can run above the 16 MB line.
Multiple Natural sessions can be started in parallel within one batch region;
see Subtasking
Session Support for Batch Environments.
The NTOS macro contains several generation parameters to change Natural for z/OS batch mode interface's internal defaults.
These parameters are: ABEXIT |
LBPNAME |
LE370 |
SUBPOOL
| TIOBSZ1 |
TIOBSZ2 |
USERID
This parameter specifies the mode of abend processing within Natural.
ABEXIT=ESTAE |
Natural intercepts all abends and issues the appropriate error messages. This is the default value. |
ABEXIT=SPIE |
Only program checks
(S0Cx abends) are intercepted as they
used to be with Natural Version 2.1.
|
ABEXIT=NONE |
Natural does not intercept any abends or program checks at all.
This value corresponds to profile parameter The setting |
This parameter controls the sharing of the local buffer pools when running multiple Natural sessions within the same region. It defines the name of the shared buffer pool environment and is used to locate the shared local buffer pool.
LBPNAME=name |
name can be 1-8 characters long. |
LBPNAME= |
The default value is none, that is, the local buffer pools are not shared. |
When running multiple Natural sessions in a z/OS batch or TSO
environment concurrently, each session allocates storage for a separate local
buffer pool. Except for the Natural z/OS batch mode server, the local buffer
pools are not shared by default, that is, if the different sessions use the
same Natural objects, these have to be loaded once for each session separately.
If name is specified, all Natural
sessions will share the same local buffer pool.
This parameter specifies whether Natural is to run in the IBM Language Environment (LE).
LE370=YES |
You can call external subprograms according to the IBM calling conventions. |
LE370=NO |
You can only call main programs of the Language Environment.
This is the default value.
This means a new LE enclave is created and terminated for each
|
LE370=POSIX |
You can call external subprograms according to the LE calling
conventions with POSIX semantics, that is, the LE is initialized with runtime
option POSIX(ON).
|
LE370=AMODE24 |
Support of external subprograms linked in addressing mode 24.
LE is initialized with options ALL31=(OFF) and
STACK=(,,BELOW).
Specify |
LE370=NOHDLR |
No setting of an LE error handler is done by Natural during the call of LE subprograms. This means, if an unhandled error occurs during the execution of an LE subprogram, the LE enclave is terminated and so the Natual session is lost. |
Multiple parameter values are enclosed in brackets, for example:
LE370=(YES,POSIX,AMODE24)
For more information about Natural running with the IBM Language Environment, refer to Natural Execution - Miscellaneous Topics, LE Subprograms.
This parameter defines the storage subpool for GETMAIN
requests.
SUBPOOL=nnn |
Possible value for nnn:
"0" to "127".
|
SUBPOOL=0 |
The default value is "0". |
This parameter specifies the size of the primary I/O buffer for batch
processing. It will be allocated below the 16 MB line. For server processing,
parameter TIOBSZ2 is used instead.
TIOBSZ1=nnnn |
nnnn is the size of
the primary I/O buffer in bytes. Possible values: 4096 – 16777216.
The default value is 8192.
|
See also generation parameter TIOBSZ in
Natural TSO Interface
Generation Parameters in the TP Monitor
Interfaces documentation.
This parameter specifies the size of the primary I/O buffer for server
processing. It will be allocated below the 16 MB line. For batch processing,
parameter TIOBSZ1 is used instead.
TIOBSZ2=nnnn |
nnnn is the size of
the primary I/O buffer in bytes. Possible values: 4096 – 16777216.
The default value is 65520.
|
See also generation parameter TIOBSZ in
Natural TSO Interface
Generation Parameters in the TP Monitor
Interfaces documentation.
This parameter specifies the content of the system variable
*INIT-USER.
USERID=YES |
The variable is set to either the user ID from the security access control block (ACEE) if a security package (as RACF or ACF2) is involved or the user parameter from the job card. |
USERID=NO |
The user ID is the job name. This is the default value. |
The content of *INIT-USER can be changed
by the user ID exit NATUEX1 during session initialization. For
more information, see Configuring Natural, Natural
User Exits, NATUEX1 - User Exit
for Authorization Control.
The following datasets are required if certain functions are used during a Natural z/OS batch mode session:
| Dataset | Explanation |
|---|---|
CMEDIT
|
Software AG Editor Work File |
CMHCOPY
|
Hardcopy Print Output |
CMOBJIN
|
Input for Natural INPUT Statements
|
CMPLOG
|
Dynamic Profile Parameter Report Output |
CMPRINT
|
Primary Report Output |
CMPRMIN
|
Dynamic Profile Parameter Input |
CMPRTnn
|
Additional Reports 01-31 |
CMSYNIN
|
Primary Command Input |
CMTRACE
|
External Trace Output |
NATRJE
|
Job Submit Output |
STEPLIB
|
Load Library for External Modules |
CMWKFnn
|
Work Files 01-32 |
These datasets are described below.
For sequential data output sets, the default DCB
RECFM/LRECL information is as follows:
RECFM=FBA and LRECL=133
The Software AG Editor work file VSAM dataset is required if a local or global Software AG editor buffer pool is to be used.
If not defined in the JCL, the name of the Editor work file specified
by subparameter DSNAME of
profile parameter EDBP or parameter
macro NTEDBP
is used by Natural to do the dynamic allocation for the Editor work file.
Alternatively, profile parameter EDPSIZE can be
used to run with an auxiliary editor buffer pool, which doesn't require an
editor work file. For more information about the installation of the Software
AG editor, please refer to Installing the Software AG
Editor in the Natural Installation
documentation.
The default name of the hardcopy print output dataset is
CMHCOPY. It can be changed by one of the following:
the subparameter DEST of
profile parameter PRINT for Print File
0,
the profile parameter HCDEST, which is an
equivalent of PRINT=((0),DEST=...),
the setting of the system variable
*HARDCOPY
during the session,
the terminal command %H during the
session.
The subparameters of the profile parameter
PRINT for
Print File 0 can be used to change the default values for the hardcopy dataset.
The default dataset name CMHCOPY implies
CLOSE=FIN
for the hardcopy print dataset, that is, after the dataset has been opened for
output, any subsequent change of the hardcopy print output dataset name will
not be honored. If a different name is defined at open time, the hardcopy
dataset will be closed according to subparameter
CLOSE of
profile parameter PRINT for Print File
0.
During the session, the hardcopy dataset can be released and
reallocated (before open or after close) by the by dynamic allocation (via
application programming interface USR2021N, see
SYSEXT - Natural Application
Programming Interfaces).
This dataset can be used to read data by the Natural
INPUT statement rather
than from the primary input dataset CMSYNIN.
The usage of CMOBJIN is controlled by the profile
parameter OBJIN. The input
record data length for Natural is determined by profile parameter
SL. The
maximum record length (LRECL) supported is 255. The record format
(RECFM) can be fixed or variable.
If profile parameter PLOG=ON is set and
dataset CMPLOG is available, the evaluated dynamic profile
parameters are written to this dataset during session initialization. If
dataset CMPLOG is not available, the evaluated dynamic profile
parameters are written to CMPRINT.
CMPRINT is used for the primary output report resulting
from DISPLAY,
PRINT and
WRITE statements in a
Natural program.
If not defined in JCL, CMPRINT will be allocated
dynamically as
//CMPRINT DD SYSOUT=*
when the first record is to be written.
CMPRMIN can be used as a dynamic parameter dataset to
overcome the length restriction for the character string in the job control
PARM keyword of the EXEC statement.
If available, this file is read during session initialization to get the dynamic profile parameters.
All input records from CMPRMIN are concatenated into one
parameter string. Only the first 72 positions of each CMPRMIN
record are significant. Trailing blanks at the end of each record are
truncated; if the last non-blank character is a comma, all trailing blanks are
truncated, otherwise just one blank is left as delimiter; no commas are
inserted.
Additional dynamic parameters can be supplied using the job control
PARM keyword. They are concatenated at the end of the
parameter string which was built from the input of CMPRMIN, that
is, these can be used to overwrite the parameters from
CMPRMIN.
These datasets can be used by Natural print file statements like
WRITE
(nn). If no DCB information (for
example, RECFM, LRECL, BLKSIZE) is
available, the defaults are defined by the PRINT profile
parameter or the NTPRINT
macro in the Natural parameter
module. The print file names can be overwritten by subparameter
DEST.
This dataset is used to read command input and data requested by the
Natural INPUT
statement. The latter is controlled by the profile parameter
OBJIN (see
also CMOBJIN).
The input record data length for Natural is determined by profile
parameter SL.
The maximum record length (LRECL) supported is 255. The record
format (RECFM) can be fixed or variable.
If profile parameter ETRACE=ON is set
or the equivalent terminal command %TRE+ was issued,
any Natural trace output during the session is written to the
CMTRACE dataset. To define the Natural components that are to be
traced, the profile parameter TRACE is
required.
If dataset CMTRACE is not available, it will be allocated
dynamically as
//CMTRACE DD SYSOUT=*
when the first trace record is to be written.
This dataset is used for the Natural job submitting utility. If it is not defined, it will be allocated dynamically as
//NATRJE DD SYSOUT=(A,INTRDR)
when the first job is submitted.
STEPLIB is the default load library name for loading
external modules, for example:
the shared nucleus (profile parameter
NUCNAME),
a separate Adabas link routine module (profile parameter
ADANAME),
the session back-end program (profile parameter
PROGRAM),
any external subprograms not linked to the Natural parameter module.
The load library name can be changed by profile parameter
LIBNAM.
The specified load library name must be defined by a DD statement in the
JCL.
These datasets can be used by Natural work file statements like
READ WORK
nn and
WRITE WORK
nn.
If no DCB information (RECFM, LRECL,
BLKSIZE, etc.) is available in the JCL or in the VTOC entry for
the dataset, the defaults are defined by the WORK profile
parameter or the NTWORK
macro in the Natural parameter module.
The work file dataset names can be overwritten by subparameter
DEST.
