METHOD FOR BALANCING LOAD OF DISK ARRAY STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a method regarding management of a data processing system in general and more particularly regarding management of a disk array storage device. SOLUTION: The balancing of loads of the degree of activity on a physical disk storage device is achieved by monitoring reading and writing to blocks at adjacent storage positions on the physical disk storage device. A list of exchangeable pairs of blocks is developed by size. Statistical values accumulated over a certain time interval are used for obtaining the values of the degree of activity of access to the each block and the each physical disk derive. One pair of blocks are selected by statistical analysis. Exchange is performed after a test to determine an adverse effect generated by the change of blocks and the loads are distributed on individual physical storage devices with one layer in average.