| 摘要 |
<p>PURPOSE:To improve reliability of a composite computer system with use of a memory of each computer and with no use of a shared memory, by providing a multiplexer in place of the shared memory and performing communication of data among computers via multiplexers. CONSTITUTION:Each computer secures communication with a main memory 16 via a communication adaptor 11 and a data exchange device (multiplexer) I. In other words, a memory needed for a computer II if existing among those memories of a computer I is transferred via the device I in the packet communication using a time slot of a transmission frame. Then the multi-address communication is carried out in case a computer III needs the same data. In a system where many computers are connected, a function code communication method is applied to send data to a desired computer only. As a result, the memory 16 of each computer has the same function as a shared memory to omit a data copying function to a back-up system that is needed for the shared memory together with a simple switching action of computers.</p> |
