Storage apparatus and method of controlling storage apparatus
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United States of America Patent
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Oct 29, 2013
Grant Date -
May 2, 2013
app pub date -
Oct 26, 2011
filing date -
Oct 26, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A storage apparatus provides a server apparatus with virtual volumes in thin provisioning; allocates a physical page to each pool page from a storage pool that is able to provide a plurality of types of physical pages classified into tiers, the pool page being an allocation unit of a storage area to the virtual volumes; stores an I/O count of each of the pool pages, stores an I/O count policy set for each of the applications; when receiving an I/O request, counts the I/O count of each of the pool pages in accordance with the I/O count policy set for the application having sent the I/O request; determines the tier of the physical page to be allocated to each pool page according to the I/O count of each pool page; and allocating the physical page in the tier determined for each of the pool pages.
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