The following examples show the IOPT statements for two different scenarios.
Example 1
IOPT monitors all devices. The settings of /MODIFY-TASK-CATEGORIES or the default values of the IOPT statement IOPT_PRI (see "Defining and querying threshold values for I/O priority classes") apply for the I/O priority classes:
/START-IORM IOPT_SET_ON=YES IOPT_DEV_ADD=ALL END
Here the IOPT statements can be entered in dialog mode or stored in the SYSDAT.IORM.nnn file.
Example 2
The logical devices 8800, 8801, 8810, 8820, 8821 and 8822 are located on a physical device. Applications with IO-PRIO=HIGH are active on 8800 and 8801, and applications with IO-PRIO=LOW on 8810, 8820, 8821 and 8822. The applications with IO-PRIO=LOW disturb the applications with IO-PRIO=HIGH. IORM does not recognize a clash on the logical devices because the utilization of the ports, paths and channels is still below the specified threshold values. Consequently a device group 001 is defined.
The settings of /MODIFY-TASK-CATEGORIES or the default values of the IOPT statement IOPT_PRI (see "Defining and querying threshold values for I/O priority classes") apply for the I/O priority classes:
/START-IORM IOPT_GRP_001_ADD=D-R(8800,8801) IOPT_GRP_001_ADD=D-R(8810,8810) IOPT_GRP_001_ADD=D-R(8820,8822) END
Here the IOPT statements can be entered in dialog mode or stored in the SYSDAT.IORM.nnn file.