| 摘要 |
PURPOSE: To shorten the wait time up to the completion of all data transfer by making a data processor which does not receive data yet serves as a data processor which transmits data after receiving the data, and performing data transfer by plural data processors in parallel. CONSTITUTION: A POS terminal 100 with a terminal number 0 transfers data to POS terminals 101, 105, and 107 with terminal numbers 1, 5, and 7 according to a master-slave relation table. The POS terminal 101 to which the data are transferred from the terminal number 0 stores the transferred data in its data file and transfers the data to POS terminals 102 and 104 with terminal numbers 2 and 4 as its slave terminals according to the master-slave relation table. The POS terminal 102 with the terminal number 2 stores the data, transferred from the POS terminal 101 with the terminal number 1, in its data transfer file and transfers the data to a POS terminal 103 with a terminal number 3 as its slave terminal. |
