| 摘要 |
PURPOSE:To attain high-speed swapping by providing a means for generating a channel program between a main storage and a secondary storage for swapping while using a page table updating means and a unit map updating means to decreased the seek time and the rotation waiting time of a magnetic disk. CONSTITUTION:When a swap-out request of a job A is inputted, a channel program generating means 7 calculates a minimum unit number and a unit map updating means 60 informs an address on the swapping secondary storage 30 for a head record of each unit to a channel program generating means 70. When the notice is received, the program generating means 70 generates a channel program transferring the content of the main storage 10 corresponding to each page descriptor 21 of the page table 20 to an address on the secondary storage for swapping of a head record of each unit information from the unit amp updating means 60 at each unit. Thus, the seek time and rotation waiting time of a magnetic disk are decreased.
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