STORAGE APPARATUS AND CONTROL METHOD OF STORAGE APPARATUS

摘要

A storage apparatus with which billing amounts in the case of write count-dependent billing can be predicted, comprises a physical storage device which provides logical volumes of different types, and a controller which executes I/O control by classifying each of the logical volumes of different types into tiers of different response performances. In a case where a write request is issued to any virtual page which configures the virtual volume, the controller assigns any real page which configures a logical volume to the virtual page, writes data to the real page, and performs a write count. The controller calculates a billing amount per fixed time interval on the basis of the performed write count, calculates tier ranges so that the billing amount per fixed time interval does not exceed the billing upper limit value, and relocates the real page on the basis of the calculated tier range.

主权项

1. A storage apparatus which calculates a billing amount in accordance with a data write count, comprising:
a physical storage device which provides logical volumes of different types; and a controller which executes I/O control by classifying each of the logical volumes of different types into tiers of different response performances and associating each of the logical volumes which belong to any of the tiers with a virtual volume provided to a higher level device, wherein, in a case where a write request is issued to any virtual page which configures the virtual volume, the controller assigns any real page which configures a logical volume to the virtual page, writes data to the real page, and performs a write count, wherein the controller calculates a billing amount per fixed time interval on the basis of the performed write count, wherein the controller calculates tier ranges of the tiers on the basis of an I/O frequency of the virtual page so that the billing amount per fixed time interval does not exceed the billing upper limit value, and wherein the controller relocates the real page on the basis of the calculated tier range.