The OSMC processing system name specifies the system where the OSMC processing for an Object or Object Backup storage group is to be performed. This name is used within an OAMplex where multiple instances of OAM are running in a Parallel Sysplex sharing a common configuration and DB2 database. When the OSMC cycle window occurs, the system specified in the OSMC processing system name of the storage group is where the storage group automatically starts. If the OSMC processing system name is left blank, the storage group cycle runs on all systems in an OAMplex during the cycle window.
If you use the MODIFY OAM,START,OSMC command to start a full OSMC cycle, the storage groups with an OSMC processing system name that matched the system where the command was entered are started. Also, storage groups with no specified OSMC processing system name are started.
If you use the MODIFY OAM,START,STORGRP command, the storage group specified is started on the system when the command was entered. Any specification in the OSMC processing system name for that storage group is ignored.
Recommendation: The system name that you specify for a storage group should be the same system where the hardware associated with the object storage group is connected. If the Object storage group has libraries associated with it that are owned by different OAMs in the OAMplex, then determine if there is a higher volume of data localized to one instance of OAM and use that system as the OSMC processing system name. You might need to modify and tune this information to meet performance objectives for your installation.