Tiered storage system, computer using tiered storage device, and method of correcting count of accesses to file
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United States of America Patent
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Apr 3, 2018
Issued Date -
N/A
app pub date -
Sep 14, 2016
filing date -
Aug 25, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
According to one embodiment, a tiered storage system includes a tiered storage device and a computer. The computer uses the tiered storage device, and includes a file system and a correction support unit. If an access request from an application is a write request to request overwriting of data, the file system executes a copy-on-write operation. The correction support unit causes the storage controller to carry over an access count manacled by the storage controller and associated with the logical block address of a copy source in the copy-on-write operation, to an access count associated with the logical block address of a copy destination in the copy-on-write operation.
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