To create an Oracle DSN with the iqdsn utility, use:
iqdsn -w data-source-name -or -c configuration-options
Table 3-1 describes the configuration options.
For example:
iqdsn -w MyOracleDSN -or -pe -c Userid=dba;Password=sql;SID=abcd;ArraySize=100000;ProcResults=y;enableMSDIC=n