Abstract: A program for causing an information processing apparatus to execute a process of a virtual calculator, the process including judging, when a switching of a virtual address space being a processing target of a virtual calculation apparatus occurs, whether or not a there exits physical calculation apparatus in which cache information of a physical address space corresponding to a virtual address space of a switching destination is accumulated; selecting the physical calculation apparatus when there exists a physical calculation apparatus in which the cache information of the physical address space is accumulated, and selecting the physical calculation apparatus in which cache information itself is not accumulated when there exists no physical calculation apparatus in which the cache information is accumulated; and assigning the selected physical calculation apparatus to the virtual calculation apparatus in which the switching of the virtual address space being a processing target has occurred.

Abstract: The present invention is for increasing operational speed for appending or updating data in a remote database system of the client-server type. When an operational unit of a client node accesses a record file in a server node, and when an attribute associated with an item to be accessed is the likely source of error on accessing, to an output command to the record file in the server node, synchronous operation is performed where the client node waits for notification of an output completion result from the server node and then proceeds to the subsequent transactions. On the other hand, asynchronous operation is performed, when there is no possibility of error, where the client node proceeds to the subsequent transactions without waiting for notification of an output completion result from the server node.