High-speed concurrent access method for power system large data files across platform

The invention discloses a high-speed concurrent access method for power system large data files across a platform, which is characterized in that a cache management system capable of carrying out the unified management on all data files when a system runs and is responsible for interaction with actual disk files is set; the data files are processed in a memory-mapped file mode; the cache management system concurrently maps each portion of the data files to the minor address space in a data-processing service process one by one by using a method that the data files are divided into fixed block memory-mapped files; and the cache management system sets a high-speed buffer area which does not re-load loaded data accessing once more, thereby enhancing the efficiency and the speed of access. The high-speed concurrent access method of the power system large data files across the platform can meet the convenience, the rapidity and the reliability of an application program to the concurrent access of the large data fi