Abstract: An HA (High Availability) scenario compiler is arranged in one of a group of computers constituting a multi-computer system, or a computer independent of the system. An HA scenerio abstractly and integrally describing the configuration and control contents of the system is read and decomposed into separate processes for the respective computers. An HA script set in a form directly executable by the respective computers is generated from the HA scenario. HA script for each one of the computers are respectively distributed to specific directories of the computers by an HA script distribution mechanism.

Abstract: Working sets, each of which is specific to a code section, a data section, and a stack of a task are arranged in a memory. Page-in and page-out processing sections are arranged in the working sets. A determination section determines a code section virtual space, data section virtual space, or stack virtual space to which a virtual page causing a page fault belongs, and supplies a page-in request to one of the page-in processing sections corresponding to the working sets. When the corresponding working set is not full, the page-in processing section reads in the virtual page causing the page fault in the working set. When the working set is full, the page-in processing section supplies a page-out request to a page-out processing section.