Explanation: OPTIMIZE(option) is used to override the usage of the SETSYS ABARSOPTIMIZE command. The OPTIMIZE parameter is passed to and used by DFSMSdss when backing up level 0 DASD data sets.
Defaults: The default value for option is the value specified on the SETSYS ABARSOPTIMIZE command. If SETSYS ABARSOPTIMIZE was not specified, then this parameter defaults to 3.