| 摘要 |
A multiple computer system is disclosed in which n computers (M 1 , M 2 . . . Mn) each run a different portion of a single application program written to execute only on a single computer. The local memory of each computer is maintained substantially the same by updating all computers with every change made to addressed memory locations. Contention can arise when the same memory location is substantially simultaneously updated by two or more machines because of transmission delays and latency of the communications network interconnecting all the computers. In particular a method of data consolidation which permits contention detection and resolution is disclosed. A count value indicative of the cumulative number of times each memory location has been updated is utilized. Contention is indicated if the currently stored count value and the incoming updating count value are the same. The volume of memory occupied can be consolidated by deleting the count value, or reducing it from 32 bits to 1 bit, from time to time, and re-initializing the count value as necessary. An individual count value for each updating signal ( 95, 195 ), and a group updating signal ( 295 ) having a single count value, are both disclosed.
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