Operating Your Servers

Starting and Stopping SAS Servers on z/OS

On z/OS systems, the SAS Deployment Wizard initially starts the SAS servers under UNIX System Services (USS) by using scripts that are provided for each server. After the initial installation and configuration has been completed and validated, SAS recommends that you stop the servers and restart them as started tasks.

The SAS Deployment Wizard creates started task definitions for each server. The definitions are stored in SAS-installation-location.W0.SRVPROC. To deploy the started tasks, see the instructions.html document that is created by the SAS Deployment Wizard.

After the started tasks are deployed, you can operate your servers as follows:

Log on as the SAS Installer user (for example, sas).
To start a server, use the following console command:
```
START started-task-name
```
To stop a server, use the following console command.
```
STOP started-task-name
```
Note:
- You can perform the equivalent of a restart by stopping and then starting a server.
- Stopping the metadata server stops other components, including object spawners, OLAP servers, table servers, SAS/CONNECT spawners, and SAS/SHARE servers.
Messages are written to the system log when the SAS Metadata Server, the SAS OLAP Server, or the SAS/SHARE server is started or stopped. Automated tools can scan the system log to determine the current operational state of these servers. The log messages are displayed with the prefix SAH, as shown in the following examples:
```
SAH011001I SAS (9.2) Metadata Server <(port-number)>, State, starting 	
SAH011999I SAS (9.2) Metadata Server <(port-number)>, State, running 	
SAH019001I SAS (9.2) Metadata Server <(port-number)>, State, stopping 	
SAH019999I SAS (9.2) Metadata Server <(port-number)>, State, stopped
```

When servers are running under USS, you can start and stop the servers as follows:

by using individual scripts that are provided for each server. See Using Scripts to Operate SAS Servers Individually.
by using the sas.servers script. See Using the sas.servers Script on UNIX or z/OS to Start or Stop All Servers.

These methods are not recommended for production environments.

For more information about using SAS on z/OS, see the SAS Companion for z/OS.

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