Data processing system for dynamically switching access control process

Abstract

A database processing system using a multi-processor including a plurality of processor modules each having a local memory connected to an external shared memory. The database processing system includes a composite structure definition control part for defining an administrative processor module for controlling an access to a composite structure of a database which has a storage structure independent of a logical structure; and a maintenance/selection control part in an optimum control processor for providing a function of access-controlling a shared process and a local process when an access request arises for a database composite structure, and for dynamically switching the access control process for the composite structure according to the access frequency notified by each processor module. The system may further include an operation continuing control part for providing a controlling function for a recovery process for the composite structure of a database to be locally processed or shared-processed, and for performing a recovery process according to an access control process type for the composite structure of the database when the processor module falls in error, by replacing the erroneous processor module with another single processor module or a plurality of processor modules.