Performance issue in duplicating the database

hi,

will be there be any impact on the primary system while executing the duplicate command ?

Duplicate from Primary Database to Auxiliary Database: ( both are in different servers and RMAN using primary database's controlfile, not the catolog database ).

Command:

run
{
set until time "to_date('10/14/09 15:00:00','mm/dd/yy hh24:mi:ss')";
allocate auxiliary channel a1 device type disk;
allocate auxiliary channel a2 device type disk;
allocate auxiliary channel a3 device type disk;
duplicate target database to AUX;
}