SHARED RESOURCE CONTROL METHOD, CONTROL PROGRAM AND APPARATUS THEREFOR

PROBLEM TO BE SOLVED: To provide a method that a plurality of computer systems use a resource on one medium as a communication means so as not to let a specific task occupy the resource when a plurality of tasks to be processed use the limited resource in common. SOLUTION: To enable the respective tasks to equally use the resource not by determining an upper limit amount at the fixed ratio of all amount of the resource, but by determining a resource demand rate of a resource waiting for a resource and controlling an acquisition amount of the resource. It is characterized in that the resource comprises a resource state management table and a data unit, wherein the data unit is composed of blocks to be used by respective tasks and the resource status management table has a vacant block management unit and resource demand rates for the respective tasks so as to notify the plurality of tasks for acquiring blocks and tasks releasing blocks and waiting for resources.