| 摘要 |
PURPOSE:To provide the decentralized file system which shortens the time required for the transmission of a file to a decentralized processor and the synchronization of its contents and need not to pay attention to the decentralized arrangement of files. CONSTITUTION:The file used by the decentralized file system is composed of a virtual data set and when there is a request to open the file from decentralized sides 120 and 130, only a page table is sent from an original side 110. Then a necessary page is sent from the original side 110 each time the page is required on the decentralized sides 120 and 130. Further, when page data are updated on the decentralized sides 120 and 130, only the corresponding page data on the original side 110 are updated and the same page being referred to on other decentralized sides are placed in a page absent state with a command from the original side 110. Consequently, the frequency of data transfer between the original side 110 and decentralized sides 120 and 130 is decreased, so the performance of the decentralized file can be improved. |
