| 摘要 |
A data storage device stores therein files as mirror source or mirror destination, and has ownership rights to files stored as mirror source. Having received a number of read/write requests to a file stored as mirror destination from a data processing device, the data storage device obtains an ownership right to the file, and updates ownership status of the file from mirror destination to mirror source. Thus, response time to the read/write requests to the file can be improved. After that, if the data processing device frequently requests another data storage device for access to the file, an ownership right to the file is transferred to the other data storage device, and accordingly, the ownership status of the file is updated. |
