Computer system and data management method
AssigneeHitachi, Ltd.
InventorsNaoki Futawatari, Yasutomo Yamamoto
Life of this patent
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Abstract
A first storage system copies data of a virtual area of a first virtual volume to a virtual area of a second virtual volume of a second storage system, monitors accesses with respect to multiple virtual areas of the first virtual volume, updates access information related to the accesses of the multiple virtual areas, and, based on the access information, reallocates data inside an actual area of a first pool allocated to the virtual area of the first virtual volume. The first storage system sends the access information to the second storage system. The second storage system receives the access information, and, based on the access information, reallocates data inside the actual area allocated to a virtual area of the second virtual volume.
Claims19
A storage system comprising a first storage apparatus and a second storage apparatus,
- wherein the first storage apparatus comprising:
- a plurality of storage devices;
- and
- a first controller configured to:
- provide a first logical volume including a plurality of logical areas provided by the plurality of storage devices;
- and
- manage an access characteristics of each of the plurality of the logical area of the logical volume;
- and
- transmit an information corresponding to the access characteristics of the logical volume to the second storage apparatus,
- wherein the second storage apparatus comprising;
- a plurality of storage devices including a first type storage device and a second type storage device having different performance from the first type storage device;
- and
- a second controller configured to:
- manage a virtual volume, which is a copy pair of the logical volume, including a plurality of virtual areas;
- allocate a first storage area provided by the first type storage device to a first virtual area of the plurality of virtual areas in accordance with a write operation to the virtual volume;
- receive the information corresponding to the access characteristics of the logical volume from the first storage apparatus;
- and
- change an allocation to the first virtual area from the first storage area to a second storage area, which is provided by the second type storage device, referring to the information.
A method for managing storage system, the storage system including:
- a first storage apparatus which comprises a first controller, and a plurality of storage devices;
- and
- a second storage apparatus which comprises a second controller, and a plurality of storage devices including a first type storage device and a second type storage device having different performance from the first type storage device,
- the method comprising:
- providing a logical volume including a plurality of logical areas provided by the plurality of storage devices of the first storage apparatus;
- managing an access characteristic of each of the plurality of the logical area of the logical volume;
- providing a virtual volume, which is a copy pair of the logical volume, including a plurality of virtual areas:
- allocating a first storage area provided by the first type storage device to a first virtual area of the plurality of virtual areas in accordance with a write operation to the virtual volume;
- transmitting an information corresponding to the access characteristics of the logical volume from the first storage apparatus to the second storage apparatus;
- and
- changing a storage area which allocated to the virtual area from the first storage area to a second storage area provided by the second type storage device referring to the information.
A second storage apparatus coupled to a first storage apparatus which includes:
- a plurality of storage devices;
- and
- a first controller configured to:
- provide a logical volume including a plurality of logical areas provided by the plurality of storage devices;
- manage an access characteristics of each of the plurality of the logical area of the logical volume,
- the second storage apparatus comprising:
- a plurality of storage devices including a first type storage device and a second type storage device having different performance from the first type storage device;
- and
- a second controller configured to:
- manage a virtual volume, which is a copy pair of the logical volume, including a plurality of virtual areas;
- allocate a first storage area provided by the first type storage device to a first virtual area of the plurality of virtual areas in accordance with a write operation to the virtual volume;
- receive an information corresponding to the access characteristics of the logical volume from the first storage apparatus;
- and
- change an allocation to the first virtual area from the first storage area to a second storage area, which is provided by the second type storage device, referring to the information.
Dependencies are inferred from the claim text.