Global Mirror Single Direction and Failover/Failback session properties

The properties are displayed on different tabs in the notebook. Use the Session Options tab to set properties that apply to the entire session. Use the H1-J2 Options tab to set properties that apply to the role pair.

Session Options

Enter the properties for the session.

Description

Type the description for this session.

Reset Secondary Reserves

Select this option to remove any persistent reserves that might be set on the target volumes of the copy sets when a Start command is issued for the session.

Attention: This option causes the session to overwrite all data that is on the target volume.

Fail MM/GC if target is online (CKD only)

Select this option to fail any session commands for a Metro Mirror or Global Copy relationship if the target volume is in the Online state. For more information about this state, refer to the documentation for the storage system.

This option applies only to count key data (CKD) volumes.

H1-J2 Options

Enter the properties for the role pair.

Consistency group interval time (seconds)

Type how often, in seconds, the Global Mirror session attempts to form a consistency group. A lower value possibly reduces the data exposure of the session. However, a lower value also causes the session to attempt to create consistency groups more frequently, which can increase network traffic.

Recovery Point Objective Alerts

Specify the length of time that you want to set for the recovery point objective (RPO) thresholds. The values determine whether a Warning or Severe alert is generated when the RPO threshold is exceeded for a role pair. The RPO represents the length of time in seconds of data exposure that is acceptable if a disaster occurs.

Use the following options to set the RPO threshold values. For both options, you can specify an RPO threshold in the range of 0 - 65535 seconds. The default is 0 seconds, which specifies that no alerts are generated.

Warning level threshold (seconds)

Type the number of seconds that you want to set for the warning level RPO threshold. If the RPO is greater than this value, an alert is generated.

If the value in this field is other than 0, it must be greater than the value in the Consistency group interval time (seconds) field and less than the value in the Severe level threshold (seconds) field.

Severe level threshold (seconds)

Type the number of seconds that you want to set for the severe level RPO threshold. If the RPO is greater than this value, an alert is generated and the session status changes to Severe.

If the value in this field is other than 0, it must be greater than the value in the Warning level threshold (seconds) field.