How we can run group aggregation for single group, as we have recently facing issue with descriptions those are not updating in IIQ, hence looking for the option writing a Account group refresh rule to update the descriptions.
For testing running whole group aggregation will take time, hence want to test it for a single group or some set of groups.
Doing a search on the community site there are a few single account aggregation code which you can modify to aggregate groups instead.
rObj = (ResourceObject) appConnector.getObject("account", accountName, null);
rObj = (ResourceObject) appConnector.getObject("group", groupName, null);
and it should work
Which type of connector? If its say Active Directory, change your LDAP filter to only find a subset of groups, or even a specific group to assist in your testing.