Installing the Natural Web I/O Interface Server under z/OS

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# Installing the Natural Web I/O Interface Server under z/OS

This document describes how to install a server for the Natural Web I/O Interface (product code NWO) under the operating system z/OS.

The installation of the Web I/O Interface server is performed by installation jobs. The sample jobs are contained in the data set `NWOvrs.JOBS` (where vrs represents the relevant product version) and are prefixed with `NWO`, or generated by System Maintenance Aid (SMA).

The following topics are covered:

- Prerequisites

- Content of the Web I/O Interface Server Distribution Medium

- Installation Procedure

#### Notation vrs or vr

When used in this documentation, the notation vrs or vr represents the relevant product version (see also Version in the Glossary).

## Prerequisites

For details, refer to the section Prerequisites.

## Content of the Web I/O Interface Server Distribution Medium

The installation medium contains the data sets listed in the table below. The sequence of the data sets and the number of library blocks needed are shown in the Software AG Product Delivery Report, which accompanies the installation medium.

Data Set Name | Contents
--- | ---
`NWOvrs.OBJS` | Contains the object modules of the server.
`NWOvrs.JOBS` | Example installation jobs.

## Installation Procedure

### Step 1: Allocate the Web I/O Interface Server LOAD library

(Job I008, Step 9410)

### Step 2: Create a Web I/O Interface Server configuration file and sample Clist

(Job I009 / Step 9410, 9420, 9430)

Step 9410 creates a sample `NWOCONFG` for the batch server.

Step 9420 creates a sample `Clist` to ping and terminate a Web I/O Interface server.

Step 9430 creates a sample batch job to ping and terminate a Web I/O Interface server.

The following parameters of the configuration file have to be defined. See Configuring the Natural Web I/O Interface Server. For the other parameters, the default values may be used:

`FRONTEND_NAME` | Specify the name of the Web I/O Interface server front-end module you will generate in one of the following steps.
`PORT_NUMBER` | Specify the TCP/IP port number under which the server can be connected.

### Step 3: Link the object modules into the NWO load library

(Job I054, Step 9410)

The NWO object modules must be linked with the necessary runtime extensions of your batch installations into executable load modules.

Note
The module `NATCNRFE` applies to two different products, the Natural Web I/O Interface Server (NWO) and the Natural Development Server (NDV). So if you have already installed NDV, the module `NATCNRFE` might already be there. However, it does not matter if you reinstall `NATCNRFE` with NWO because the resulting module from either installation is the same.

See sample job `NWOI054` on data set `NWOvrs.JOBS`.

### Step 4: Create the Natural parameter module and NWO server front-end module

(Job I060, Steps 9410, 9420, 9430)

- Job I060, Step 9410 starts the batch program `IEBUPDATE` to store the parameter module `NWOPARM`.

- Job I060, Step 9420 assembles and links the parameter module `NWOPARM`.

- Job I060, Step 9430 links the NWO server front-end module.

  The reentrant `ADALINK` module `ADALNKR` must be used.

  Note
  If you have Natural subproducts for IBM database access installed, for example, Natural for Db2, Natural for VSAM, you need to adjust the link job to include `ATRRCSS` from `SYS1.CSSLIB` in order to enable the use of `SYNCPOINT`/`ROLLBACK` functionalities.

### Step 5: Create server startup JCL

(Job I200, Step 9415)

Described in the section Configuring the Natural Web I/O Interface Server. See sample member `NWOSTART` on data set `NWOvrs.JOBS`.

Step 9415 creates a startup procedure for the batch server.

#### Sample:

    //         PROC SRV=SAGNWO
    //NWO      EXEC PGM=NATRNWO,
    // REGION=4000K,TIME=1440,PARM='POSIX(ON),TRAP(ON,NOSPIE)/&SRV'
    //STEPLIB  DD   DISP=SHR,DSN=NWOvrs.LOAD
    //         DD   DISP=SHR,DSN=SAGLIB.SMALOAD
    //SYSUDUMP DD   SYSOUT=X
    //CEEDUMP  DD   SYSOUT=X
    //CMPRINT  DD   SYSOUT=X
    //STGCONFG DD   DISP=SHR,
    //              DSN=NWO.CONFIG(&SRV)
    //STGTRACE DD   SYSOUT=X
    //STGSTDO  DD   SYSOUT=X
    //STGSTDE  DD   SYSOUT=X
    //SYSOUT   DD   SYSOUT=X

Note
The Web I/O Interface server account must be defined in the z/OS Linux System Services (OE segment). If the server account is not defined, the server ends with U4093 and system message `CEE5101C` in the trace file.

### Step 6: Web I/O Interface clients must be defined to Natural Security

If Natural Security (NSC) is installed:

- The Web I/O Interface initial user ID (default ID is `STARGATE`) must be defined in Natural Security with a valid default library. Refer also to Web I/O Interface server configuration parameter `INITIAL_USERID`. Alternatively, you can define the Natural profile parameter `AUTO=OFF` (automatic logon) for the Web I/O Interface.

- Each client user ID must be defined in Natural Security.

If the Web I/O Interface initial user ID is not defined, the Web I/O Interface server initialization aborts with a NAT0856.

If a Web I/O Interface client is not defined, the server connection returns an NSC error.

If you connect to the server from a Web I/O Interface client, make sure that the user who is defined in Natural Security has a default library or a private library defined. Otherwise, error message NAT0815 will occur.

### Step 7: Web I/O Interface clients must be defined to the server host

If you configure the Web I/O Interface server to use an external security system (see Web I/O Interface server configuration parameter `SECURITY_MODE`), the Web I/O Interface clients must be defined to the external security system.

### On this page

- Prerequisites
- Content of the Web I/O Interface Server Distribution Medium
- Installation Procedure