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