US 2014/0195760 A1Published application

Storage apparatus and data management method

AssigneeHitachi, Ltd.

InventorsKoji IWAMITSU, Hiroaki AKUTSU, Daisuke ENDO

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Abstract

A storage apparatus for which a hierarchical data management system is adopted is designed so that when receiving a read request for a first logical area to which a first storage area of a first storage device in a virtual volume is allocated, whether or not to migrate data in a first storage area of the first storage device, to a storage area of a second storage device is decided according to an access frequency to the first logical area in synchronization with the read request. When it is decided that the data stored in the first storage area of the first storage device should be migrated to the storage area of the second storage device, the data is migrated to a second storage area of the second storage device and the second storage area thereof is allocated to the first logical area in the virtual volume.

Claims12

Dependent claims

A storage apparatus being coupled to a host computer, comprising:

a plurality of storage devices including a first storage device and a second storage device whose performance is higher than that of the first storage device;
and
a controller providing a virtual volume including a plurality of logical areas to the host computer, and allocating at least one of a plurality of storage areas in the plurality of storage devices to a logical area of the virtual volume after receiving a write request to the logical area of the virtual volume;
wherein, the controller is configured to:
determine, in response to receiving a read request or a write request to the virtual volume, whether or not to migrate data in a first storage area of the first storage device allocated to a first logical area in the first virtual volume corresponding to the read request or the write request, to a second storage area of the second storage device based on an access frequency corresponding to the data;
and
migrate the data in the first storage area of the first storage device to the second storage area of the second storage device according to a result of the determination;
and
allocate the second storage area of the second storage device to the first logical area in the virtual volume.

6 more elements

A method of managing a storage apparatus coupled to a host computer, the storage apparatus having a plurality of storage devices including a first storage device and a second storage device whose performance is higher than that of the first storage device, and a controller which provides a virtual volume including a plurality of logical areas to the host computer, and which allocates at least one of a plurality of storage areas in the plurality of storage devices to a logical area of the virtual volume after receiving a write request to the logical area of the virtual volume, the method comprising:

determining, in response to receiving a read request or a write request to the virtual volume, whether or not to migrate data in a first storage area of the first storage device allocated to a first logical area in the first virtual volume corresponding to the read request or the write request, to a second storage area of the second storage device based on an access frequency corresponding to the data;
and
migrating the data in the first storage area of the first storage device to the second storage area of the second storage device according to a result of the determination;
and
allocating the second storage area of the second storage device to the first logical area in the virtual volume.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/199,302Filed 6 Mar 2014
Priority: 19 Nov 2012
Published: 10 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G06F 3/0659
Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices: command handling…
G06F 3/0604
Specifically adapted to achieve a particular effect: improving or facilitating administration, e.g. storage management
G06F 3/0611
Improving I/O performance: in relation to response time
G06F 3/0613
Improving I/O performance: in relation to throughput

Family

Application13/643,232Continuation · filed 19 Nov 2012
Application14/199,302Continuation
US 2014/0108759 A1Published application
US 8,918,609 B2Related patent
US 9,235,353 B2Related patent
US 2014/0195760 A1This patent

From the US filing history. Foreign family members aren’t listed.

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