| 摘要 |
A volume group 4 consists of a plurality of volume subgroups 41 to 4n. For example, volume subgroup 41 includes volumes 41-1 to 41-a on electronic disk units, and volume subgroup 4n includes volumes 4n-1 to 4n-d on magnetic disk units. Prioritized volume subgroups Table 5 for temporary file allocation contains priority values 11 to 1m to be assigned to user programs and the corresponding prioritized volume subgroups 511 to 51m. At the request of temporary file allocation from the user program, a temporary file allocation means 2 receives the priority 11 from a priority returning means 3, and in reference to the prioritized volume subgroups Table 5, allocates the temporary files preferentially to suitable volumes of a volume subgroup included in the corresponding prioritized volume subgroup to the priority value 11.
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