File copying processor

Abstract

Abstract PURPOSE:To dynamically copy a file under a shared exclusive control of a block unit by executing simultaneously a copy processing and other updating processing and preventing the deterioration of the processing efficiency, and also, setting the data of a copying origin and a copying destination to the same. CONSTITUTION:When data of a file being on a storage medium is copied to other file, a shared exclusive control of a block unit is executed, and with respect to the file of a copying origin, only a block processed most recently is excluded, other blocks are not excluded, and whether copying is executed to each block or not is managed. As for the block copied already, not only the file of the copying origin but also a file of a copying destination are updated simultaneously, and as for the block which is not copied yet, only the file of the copying origin is update. In such a way, at the time of copying the data to other file, it can be processed simultaneously with other updating processing without occupying the file, and also, copying can be executed in a state that there is no difference between the data of the copying origin and the copying destination, the processing efficiency is improved, and the service can be improved by executing dynamically a release at the time of fault of a medium.

Inventors

• 👤 Kazuyuki Miyazawa
• 👤 和幸 宮澤

Bibliographic Details