| 摘要 |
In the present invention, when configuration data on a LFS (Log-Structured File system) is stored on a virtual volume constructed from a plurality of storage mediums, a temporal change of the file size on the file system is roughly estimated. Then, in accordance with the change, a capacity that is needed on the virtual volume is provided, a cursor at the end of a log is set, and a write cursor for writing data is set so as to avoid the position behind the cursor at the end of the log. Accordingly, it is possible to, when the LFS occupies only a small area on the virtual volume, avoid early execution of the allocation of an available capacity, and thus avoid a circumstance in which a large number of storage mediums are needed at art early stage of the operation of the virtual volume (see FIG. 1). |
| 主权项 |
1. A storage system comprising:
a file system configured to provide a virtual volume constructed from at least one storage medium; and a processor configured to execute a process of continuously writing update data to an unused area in the virtual volume at a position behind a write cursor, and changing an area at a position preceding the write cursor, in which pre-update data has been stored, into an unused area, wherein the processor is configured to control a size of a capacity allocated to the virtual volume from the storage medium based on a capacity that is necessary to write the update data, a capacity of the unused area at the position preceding the write cursor, and a capacity of the unused area at the position behind the write cursor. |
