| 摘要 |
PROBLEM TO BE SOLVED: To reduce the delay of data access by processing data retrieving operation, which does not require performing of a first prescribed task, without performing the first prescribed task. SOLUTION: A queue manager 48 fetches a first job from the head of a list to decide whether making a watermark is required or not, etc., (S350). When a request does not require a watermark, the job is added to the job queue of a user within 'fast ring' whose processing operation to be performed is relatively faster than the making of the watermark (S410). When the making of a water mark is required, its processing job is added to the queue of a user in circularly linked 'slow ring' circularly linking jobs requiring the making of the watermark (S380). Consequently, this helps the improvement of assignment of resources to reduce delay to be encountered in the case of operation which is not processor intensive. |
