| 摘要 |
To store data in an insertion process, a process 1 that inserts data into a new block and a process 2 that inserts, within the block reserved, data into areas that became free when data was deleted are prepared. A switching event to switch from the process 1 to the process 2 is designated in advance. The occurrence of the designated event is checked while executing the process 1 in an insertion process, and if the designated event occurs, the insertion process executes the process 2 . If during the execution of the process 2 , areas that can be reused become depleted, the execution of the insertion process reverts back to the process 1 . As a result, free areas resulting from deletions can be reused according to the switching event designated.
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