The @SYSID macro defines the default system startup ID. CA ACF2 for z/VM maintains a current SYSID value that it uses to select VMO records when you define VM system options. This SYSID value is the default SYSID the ACF command uses when you enter the CONTROL(VMO) mode. CA ACF2 for z/VM also places the SYSID into SMF records so reports can select SMF records based on the SYSID. The syntax for the @SYSID macro is:
@SYSID sysid
Specifies the default system ID string CA ACF2 for z/VM uses during system startup to set the initial value of the current SYSID. If you specify null as the value for sysid (the default), the System_Identifier_Default value from the SYSTEM CONFIG file is used. If a value is not specified for System_ Identifier_Default, the HCPSYS SYSID macro DEFAULT= operand is used. The operator can specify SYSID(sysid) in response to the CA ACF2 for z/VM startup prompt to override this default startup SYSID during system IPL. After you complete system startup, you can use the following command to change the current SYSID value:
ACFSERVE SET SYSID
The following ACF subcommand displays the SYSID used at system IPL and the current SYSID:
SHOW SYSTEM
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