Enabling Asynchronous TCP/IP sockets I/O for Liberty on z/OS

By default, the Liberty server uses a Java implementation to handle incoming TCPIP requests. To obtain improve performance and scalability in many environments, enable the asynchronous TCP/IP sockets I/O for Liberty (AsyncIO) on z/OS® service and take advantage of native z/OS services.

About this task

To enable the AsyncIO on z/OS service, you define the security setup to permit the Authorized AsyncIO Service(ZOSAIO):

Procedure

Start the Angel process:
```
START bbgzangl
```
For more information, see Administering Liberty on z/OS.
Define the security setup to permit the Authorized AsyncIO Service(ZOSAIO):
```
RDEF SERVER BBG.AUTHMOD.BBGZSAFM.ZOSAIO UACC(NONE)   
PERMIT BBG.AUTHMOD.BBGZSAFM.ZOSAIO CLASS(SERVER) ACCESS(READ) id(wlpuser1)
```
For more information, see Enabling z/OS authorized services in Liberty for z/OS.

What to do next

This procedure enables the AsyncIO on z/OS service by default. However, if the AsyncIO z/OS service is enabled, you can disable it within a particular server by adding the following property to the bootstrap.properties file:

com.ibm.ws.tcpchannel.useZosAio=false