Thanks Peter Yes our TSM set-up is to tape . I dont have a good background on storage . will you please help me understand on what you mean by how your TSM set-up serializes access to the backups On Mon, Feb 7, 2011 at 8:06 AM, Peter Hitchman <pjhoraclel@xxxxxxxxx> wrote: > Hi, > Assuming that you are creating each duplicate (auxiliary) database on > a different machine, and that you run the duplicate process from each > of those machines, then the only restriction will be how your TSM > set-up serializes access to the backups, assuming they are on tape. In > fact there is no reason not to run 5 duplicate commands in rman from > the machine running the target database, but that might be over the > top for that one machine in terms of loading. If your backups are to > disk in TSM, there should be no issues. But your main area of concern > here will be what TSM has been configured to do, not Oracle. > > Regards > Pete > -- > //www.freelists.org/webpage/oracle-l > > >