Here is the purpose and description of this entry or option taken from this article:
Issue: When multiple media servers have credentials to access a storage server, a media server is selected for performing image cleanup (nbdelete) based on media server load balancing. It is possible to have a remote media server that has credentials (connected by a WAN link) being selected to perform cleanup which would be extremely slow.
On NetBackup 7.0.1, it is possible to allocate specific media server to run image cleanup for specific disk media id (associated with a specific disk volume) using a configuration file named CLEANUP_MEDIA_SERVER_MAP located at /usr/openv/netbackup/db/config or Install_Path\Veritas\NetBackup\db\config on master server.
So the question is:
What to do :)
Where should I create touch file CLEANUP_MEDIA_SERVER_MAP???
Should it be created on the exact server to be used for credentils logon when cleanup occurs and be some kind of a trigger?
Or should I create this touch file on master-server and put an entry of media-server???