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Installing the Entire System Server Interface is required if the product Entire System Server or Natural ISPF is to be used.

You may choose between standard installation (recommended) and customized installation.

• Prerequisites

• Standard Installation

• Customized Installation

• Assembling the Parameter Modules for the Entire System Server Interface Component

• Linking the ESXNUC Module

• Running Entire System Server in Single-User Mode under z/OS

Notation vrs or vr:

If used in the following document, the notation vrs or vr stands for the relevant version, release, system maintenance level numbers. For further information on product versions, see Version in the Glossary.

Prerequisites

A supported version of either of the following products must be installed before you can install the Entire System Server Interface:

• Entire System Server or Natural ISPF, version as specified under Natural and Other Software AG Products in the current Natural Release Notes for Mainframes.

Standard Installation

If you want to use the recommend standard value settings in the modules ESYNODTB and NATPNIP (used by the Entire System Server and Natural ISPF), proceed with Linking the ESXNUC Module.

Customized Installation

If you do not want to use the recommend standard value settings, first edit the module NATPNIP in the Natural source library and then relink the ESXNUC module.

The content of module NATPNIP is:

NAMVIEWP BUFLEN=8192,NUMREQ=5,MAXCBL=3000,MAXEDL=3000,EXTUSER=INIT-USER

The default values are included. The NATPNIP parameters are explained below:

Possible values for EXTUSER are:

You may also edit the module ESYNODTB in the Natural source library which contains the following default values:

NAMXNOD ID=148,NAME=PRODUCTION-1
NAMXNOD ID=149,NAME=PRODUCTION-2,LAST=Y
END

When do I need to change these values?

Normally, calls to Entire System Server from Natural are handled via a NODE parameter, for example:

FIND ACTIVE-JOBS WITH JOB-NAME = 'ADA*' AND NODE = 148

where NODE contains a numeric value, but no character-oriented values.

Programmers need to know a numeric value pointing to a real Entire System Server. Using the value NODE-NAME, they may code:

FIND ACTIVE-JOBS WITH JOB-NAME = 'ADA*' AND NODE-NAME = 'DAEF'

where DAEF is the logical name of the production Entire System Server.

The table ESYNODTB defines these mappings and contains the following parameters:

Assembling the Parameter Modules for the Entire System Server Interface Component

With Natural ISPF

This section applies if Natural ISPF is used as INCORE database.

The jobs mentioned below can be found in the data set ISPvrs.JOBS.

Under z/OS and z/VSE

Link the parameter module NATPNIP, using Job I055, Step 1106. In this case, the module ESYNODTB is not required.

Under BS2000/OSD

Link the parameter module NATPNIU (for UTM) or NATPNIT (for TIAM/batch mode), using Job I055, Steps 1106 and 1108. In this case, the module ESYNODTB is not required.

With Entire System Server

This section applies if the Entire System Server is used.

The jobs mentioned below can be found in the data set NPRvrs.JOBS.

Under z/OS and z/VSE

Assemble and link the modules using Job I055, Step 1106 (NATPNIP) and, optionally, 1107 (ESYNODTB).

Under BS2000/OSD - UTM Environments

Assemble and link the modules using Job I055, Step 1108 (ANATPNIU) and, optionally, 1107 (AESYNDTB).

ANATPNIU must be assembled with NAMVIEWP EXTUSER=USER in order to use the Natural Security user ID as user ID for Entire System Server calls (if no NATPROC-LOGON is issued).

Under BS2000/OSD - TIAM and Batch Environments

Assemble and link the modules using Job I055, Step 1106 (ANATPNIT) and, optionally, 1107 (AESYNDTB).

NATPNIT must be assembled with NAMVIEWP EXTUSER=ADDRESS-SPACE. The LOGON user ID will be used as Entire System Server user ID if no NATPROC-LOGON has been issued.

Linking the ESXNUC Module

Under z/OS

You can either link all modules to the shared nucleus or link them all to the front-end.

Include the following instructions in your link job:

Optionally:

If you want to run Entire System Server in single user mode, proceed as described in the section Running Entire System Server in Single-User Mode below.

Note that you may do so only under TSO or in batch mode.

Under z/VSE

You can either link all modules to the shared nucleus or link them all to the front-end.

Include the following instructions in your link job:

Optionally:

If you want to run Entire System Server in single user mode, you may do so only in batch mode.

INCLUDE NATLIB(NATPSNGL) to the front-end and link it now as NON-REENTRANT.

This allows you to use Entire System Server in single-user mode. This module must not be linked to the shared nucleus.

Under BS2000/OSD

All modules have to be linked to the front-end part of Natural to handle different configuration settings.

Include the following instructions in your link job:

Under VM/CMS

Modify the variable LOADLIST in NAT$LOAD EXEC to include the following modules:

Proceed as described in the VM/CMS installation procedure under the heading Generate a Natural Module.

Running Entire System Server in Single-User Mode under z/OS

• General

• Installing ESY for Single-User Mode

General

Single-user ESY under z/OS is only available in batch mode and under TSO.

Running the Entire System Server (ESY) in single-user mode is advantageous, for example, in the following cases:

• Executing long running batch jobs comprising a large number of call to the Entire System Server.

• Performing test scenarios using a Natural session under TSO performing many calls to the Entire System Server, without disturbing the production environment.

• Exploring new Entire System Server functionality or versions.

From a Natural point of view, the ESY single-user mode is accessible as ESY node 148, irrespective of whether such a node does already exist on your machine or network.

The following is an example of a Natural program that is running in a single-user environment:

FIND ACTIVE-JOBS WITH NODE = 148 AND JOB-NAME = 'XCOM*'

This statement calls a single-user Entire System Server that runs within the same address-space. Calling a different ESY node that runs elsewhere in the network is possible by using a different node number, as shown in the following example:

FIND ACTIVE-JOBS WITH NODE = 53 AND JOB-NAME = 'NUC*'

This statement calls a multi-user ESY with node number 53 out of the same Natural program which called the single-user ESY session.

Installing ESY for Single-User Mode

Single-user ESY is only available in batch mode and in a TSO environment.

The following topics are covered below:

• Installing for Batch Mode
• Installing for TSO

Installing for Batch Mode

Perform the following steps:

1. Create a new PDS load library, which must be APF authorized.

2. Copy all members of the ESY load library into the new load library.

3. Link-edit the Module NATPSNGL, which handles ESY single user features, with the standard batch Natural nucleus front-end. Note that this module must not be linked with a shared Natural nucleus.

   Alternatively, you may also use the RCA parameter to load this module by setting RCA=NATPSNGL.

   In both cases, the Natural front-end must be link-edited, authorized by parameter AC=1, into the new load library.

4. To handle the ESY-relevant steps, add the mandatory cards PARMS and SYSPRINT to your JCL. In addition, you may add the optional cards ESYTRACE and CLOG.

   //ESYTRACE DD  SYSOUT=*  	   <== internal trace                           
   //SYSPRINT DD  SYSOUT=*  	   <== modules/zap directory of NPR                      
   //CLOG     DD  DISP=SHR,DSN=xxx    <== Command log dataset     
   //PARMS    DD  DISP=SHR,DSN=xxx    <== NPR Parameter
   

5. Add an Adabas load library to your JCL, which also has to be APF authorized.

6. Edit your ESY parameter member. Here, the parameter NODE will be ignored, since Natural routes any calls to node number 148 through to the single-user ESY node.

Installing for TSO

Perform the following steps:

1. Ask your system programmer to add the name of the Natural nucleus as AUTHPGM in the TSO definition member named IKJTSO00. Usually, this member is in dataset SYS1.PARMLIB.

2. Proceed analogously as described in the batch mode installation above.

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