This parameter is used to override the default setting for the node name associated with the ADSTAR Distributed Storage Manager (ADSM) product. The node name is needed to allow you to restore a database that was backed up to ADSM from another node.
The default is that you can only restore a database from ADSM on the same node from which you did the backup. It is possible for the adsm_nodename to be overridden during a backup done through DB2 (for example, with the BACKUP DATABASE command).