| 摘要 |
<p>A message communication processing system in a distributed processing system, wherein a request discrimination part (25) is provided in a reception server (20) provided between a client server (10) and a processing server (30) as the basic configuration of this invention. The request discrimination part (25) discriminates between a request for only a collation processing attended by neither update of data in a medium nor exclusion of a resource and a request for both collation and update processings accompanying change of the state of a resource. Further, the request discrimination part (25) discriminates between first, second and third request forms of the kinds of requests. A first configuration according to the invention is the one in which a client judges that a message resending processing requested through the client server (10) is normally executed in the processing server (30) when receiving a processing completion message from an issuing part (41). A second configuration is the one in which the reception server (20) specifies the processing server (30) and adds an identifier and the number of resendings added to the message from the client to a message to be transmitted to the processing server (30), and the processing server (30) holds the added identifier and the added two kinds of numbers of resendings as information to be transferred to a standby system and compares the numbers with retained values corresponding to the numbers to judge whether the transmitted message is a resending message or a redundantly transmitted message. A third request configuration is the one in which a nonvolatile storage (5) for storing a message and a message identifier added to it is provided between the in-operation system and a standby system so as to be used in common, identifier discrimination processing parts (200-11) for identifying the message identifier are provided in both systems, the message identifier comprises a multi-request ID, the contents of a request counter and of a resending counter, and a message added with a corresponding message identifier according to the multi-request ID and to the content of newly resent message is transmitted.</p> |
