MANAGEMENT SERVER DEVICE FOR MANAGING VIRTUAL STORAGE DEVICE, AND METHOD FOR MANAGING VIRTUAL STORAGE DEVICE

• US 20100274984A1
• Filed: 07/13/2009
• Published: 10/28/2010
• Est. Priority Date: 04/22/2009
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: INOMATA, Hirofumi, HAGA, Futoshi, ASAIE, Machiko, NAGAI, Takayuki, SHIMOZONO, Norio, SEKIGUCHI, Tomoki
• Granted Patent: US 8,359,440 B2
• Time in Patent Office: Days
• US Class Current: 711/162
• CPC Class Codes: G06F 3/0605 by facilitating the interaction with a user or administrator
• CPC Class Codes: G06F 3/0647 Migration mechanisms
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]

Abstract

The computer system has a plurality of physical server devices, a plurality of physical storage devices, and a management server device, and when migrating at least one of a plurality of first virtual server devices to another physical server device, the management server device compares at least one physical server device in which the plurality of first virtual server devices are disposed after the migration, with at least one physical server device in which a plurality of second virtual server devices are disposed, to calculate a first evaluation value, and also compares at least one physical server device in which the plurality of first virtual server devices are disposed after the migration, with at least one physical server device in which a plurality of third virtual server devices are disposed, to calculate a second evaluation value. Based on the first evaluation value and the second evaluation value, the management server device issues an instruction to migrate the first virtual storage device to the other physical storage device.

Claims

1. A computer system, comprising:

a plurality of physical server devices, each of which provides a virtual server device;

a plurality of physical storage devices, which are coupled to the plurality of physical server devices and each of which provides a virtual storage device; and

a management server device, which is coupled to the plurality of physical storage devices and retains first configuration information relating to a plurality of first virtual server devices included in a first virtual system and disposed in at least one of the plurality of physical server devices and relating to a first virtual storage device included in the first virtual system and disposed in one of the plurality of physical storage devices, second configuration information relating to a plurality of second virtual server devices included in a second virtual system and disposed in at least one of the plurality of physical server devices and relating to a second virtual storage device included in the second virtual system and disposed in one of the plurality of physical storage devices, and third configuration information relating to a plurality of third virtual server devices included in a third virtual system and disposed in at least one of the plurality of physical server devices and to a third virtual storage device included in the third virtual system and disposed in any of the plurality of physical storage devices,

wherein when migrating at least one of the plurality of first virtual server devices to another physical server device, the management server device calculates a first evaluation value by comparing at least one physical server device in which the plurality of first virtual server devices are disposed after the migration, with at least one physical server device in which the plurality of second virtual server devices are disposed, based on the first configuration information and the second configuration information, and calculates a second evaluation value by comparing at least one physical server device in which the plurality of first virtual server devices are disposed after the migration, with at least one physical server device in which the plurality of third virtual server devices are disposed, based on the the first configuration information and the third configuration information,

and wherein the management server device instructs the plurality of physical storage devices to migrate the first virtual storage device to another physical storage device, on the basis of the first evaluation value and the second evaluation value.

2. The computer system according to claim 1, further comprising a backup medium for storing a replication of data stored in a volume assigned to a first virtual computer,

wherein each of the plurality of physical storage devices includes a plurality of storage devices configuring a plurality of logical volumes, a first memory, a controller and a first port, and assigns the plurality of logical volumes, a first virtual memory which is a partial area of the first memory, a virtual controller obtained by logically dividing the controller, and a first virtual port obtained by logically dividing the first port, to the virtual storage devices,

each of the server devices has a second memory, a processor and a second port, and assigns a second virtual memory which is a partial area of the second memory, a virtual processor obtained by logically dividing the processor, and a second virtual port obtained by logically dividing the second port, to the virtual server devices,

the first evaluation value is obtained by dividing the number of one or more physical server devices in which the plurality of first virtual server devices are disposed after the migration, the physical server devices being included in at least one physical server device in which the plurality of second virtual server devices are disposed, by a larger one of the number of physical server devices in which the plurality of first virtual server devices are disposed after the migration, and the number of physical server devices in which the plurality of second virtual server devices are disposed,

the second evaluation value is obtained by dividing the number of one or more physical server devices in which the plurality of first virtual server devices are disposed after the migration, the physical server devices being included in at least one physical server device in which the plurality of third virtual server devices are disposed, by a larger one of the number of physical server devices in which the plurality of first virtual server devices are disposed after the migration, and the number of physical server devices in which the plurality of third virtual server devices are disposed,

the management server device further retains information relating to an assignment order for assigning the plurality of physical storage devices,

the management server device compares the first evaluation value with the second evaluation value, and when the first evaluation value is higher than the second evaluation value, issues an instruction to migrate the first virtual storage device to the physical storage device in which the second virtual storage device is disposed, and when the first evaluation value is equal to the second evaluation value, refers to the information relating to the assignment order and issues an instruction to migrate the first virtual storage device to a physical storage device that is high in the assignment order, out of the physical storage device in which the second virtual storage device is disposed and the physical storage device in which the third virtual storage device is disposed,

the management server device further retains identification information of the first virtual port of the virtual storage device, refers to the identification information and instructs a physical storage device to which the first virtual storage device is migrated, to create a virtual storage device that has a first virtual port having the same identifier as the first virtual port of the first virtual storage device,

and wherein, when the number of virtual storage devices in an operated state, out of the virtual storage devices disposed in the physical storage device in which the first virtual storage device is disposed before the migration, is equal to or lower than a threshold value, the management server device issues an instruction to migrate data stored in a volume assigned to the first virtual storage device before the migration, to a logical volume assigned to the created virtual server device, and when the number of virtual storage devices in the operated state, out of the virtual storage devices disposed in the physical storage device in which the first virtual storage device is disposed before the migration, exceeds the threshold value, the management server device issues an instruction to migrate the data stored in the backup medium, to the logical volume assigned to the virtual server created in the physical storage device to which the first virtual storage device is migrated.

3. The computer system according to claim 1, wherein the management server device compares the first evaluation value with the second evaluation value, and issues an instruction to migrate the first virtual storage device to the physical storage device in which the second virtual storage device is disposed, when the first evaluation value is higher than the second evaluation value.

4. The computer system according to claim 3, wherein the management server device further retains information relating to an assignment order for assigning the plurality of physical storage devices, compares the first evaluation value with the second evaluation value, and, when the first evaluation value is equal to the second evaluation value, refers to the information relating to the assignment order, and then issues an instruction to migrate the first virtual storage device to a physical storage device that is high in the assignment order and included in the physical storage device in which the second virtual storage device is disposed and the physical storage device in which the third virtual storage device is disposed.

5. The computer system according to claim 3, wherein

the first evaluation value is the number of physical server devices in which the plurality of first virtual server devices are disposed after the migration, the physical server devices being also included in at least one physical server device in which the plurality of second virtual server devices are disposed, and

the second evaluation value is the number of physical server devices in which the plurality of first virtual server devices are disposed after the migration, the physical server devices being also included in at least one physical server device in which the plurality of third virtual server devices are disposed.

6. The computer system according to claim 3, wherein

the first evaluation value is obtained by dividing the number of one or more physical server devices in which the plurality of first virtual server devices are disposed after the migration, the physical server devices being also included in at least one physical server device in which the plurality of second virtual server devices are disposed, by a larger one of the number of physical server devices in which the plurality of first virtual server devices are disposed after the migration, and the number of physical server devices in which the plurality of second virtual server devices are disposed, and

the second evaluation value is obtained by dividing the number of one or more physical server devices in which the plurality of first virtual server devices are disposed after the migration, the physical server devices being also included in at least one physical server device in which the plurality of third virtual server devices are disposed, by a larger one of the number of physical server devices in which the plurality of first virtual server devices are disposed after the migration, and the number of physical server devices in which the plurality of third virtual server devices are disposed.

7. The computer system according to claim 3, wherein each of the plurality of physical storage devices includes a plurality of storage devices configuring a logical volume, a memory, a controller and a port, and assigns the logical volume, a virtual memory which is a partial area of the memory, a virtual controller obtained by logically dividing the controller, and a virtual port obtained by logically dividing the port, to the virtual storage devices,

the management server device further retains identification information of the virtual port of the virtual storage device,

the management server device instructs a physical storage device to which the first virtual storage device is migrated, to create a virtual storage device that has a virtual port having the same identifier as the virtual port of the first virtual storage device, by referring the identification information and

the management server device instructs to migrate data stored in a volume assigned to the first virtual storage device before the migration, to a logical volume assigned to the created virtual server device.

8. The computer system according to claim 3, further comprising a backup medium for storing a replication of data stored in a volume assigned to a first virtual computer,

wherein each of the plurality of physical storage devices includes a plurality of storage devices configuring a plurality of logical volumes, a memory, a controller and a port, and assigns the plurality of logical volumes, a virtual memory which is a partial area of the memory, a virtual controller obtained by logically dividing the controller, and a virtual port obtained by logically dividing the port, to the virtual storage,

the management server device further retains identification information of the virtual port of the virtual storage device,

the management server deviceinstructs a physical storage device to which the first virtual storage device is migrated, to create a virtual storage device that includes a virtual port having the same identifier as the virtual port of the first virtual storage device, by referring to the identification information and,

when the number of virtual storage devices in an operated state, out of the virtual storage devices disposed in the physical storage device in which the first virtual storage device is disposed before the migration, exceeds a threshold value, the management server device issues an instruction to migrate the data stored in the backup medium, to the logical volume assigned to the virtual server created in the physical storage device to which the first virtual storage device is migrated.

9. A management method of a management server device that manages a plurality of physical storage devices which are coupled to a plurality of physical server devices each providing a virtual server device, and each of which provides a virtual storage device, the management server device being coupled to the plurality of physical storage devices, wherein the management method comprises the steps of:

retaining first configuration information relating to a plurality of first virtual server devices included in a first virtual system and disposed in at least one of the plurality of physical server devices and relating to a first virtual storage device included in the first virtual system and disposed in one of the plurality of physical storage devices, second configuration information relating to a plurality of second virtual server devices included in a second virtual system and disposed in at least one of the plurality of physical server devices and relating to a second virtual storage device included in the second virtual system and disposed in one of the plurality of physical storage devices, and third configuration information relating to a plurality of third virtual server devices included in a third virtual system and disposed in at least one of the plurality of physical server devices and to a third virtual storage device included in the third virtual system and disposed in any of the plurality of physical storage devices;

when migrating at least one of the plurality of first virtual server devices to anther physical server device, and calculating a first evaluation value by comparing at least one physical server device in which the plurality of first virtual server devices are disposed after the migration, with at least one physical server device in which the plurality of second virtual server devices are disposed, based on the first configuration information and the second configuration information, and calculating a second evaluation value by comparing at least one physical server device in which the plurality of first virtual server devices are disposed after the migration, with at least one physical server device in which the plurality of third virtual server devices are disposed, based on the first configuration information and the third configuration information; and

instructing the plurality of physical storage devices to migrate the first virtual storage device to another physical storage device, on the basis of the first evaluation value and the second evaluation value.

10. The management method according to claim 9, further comprising the steps of comparing the first evaluation value with the second evaluation value, and issuing an instruction to migrate the first virtual storage device to the physical storage device in which the second virtual storage device is disposed, when the first evaluation value is higher than the second evaluation value.

11. The management method according to claim 10, further comprising the steps of:

retaining information relating to an assignment order for assigning the plurality of physical storage devices,

comparing the first evaluation value with the second evaluation value; and

referring to the information relating to the assignment order when the first evaluation value is equal to the second evaluation value, to issue an instruction to migrate the first virtual storage device to a physical storage device that is high in the assignment order and included in the physical storage device in which the second virtual storage device is disposed and the physical storage device in which the third virtual storage device is disposed.

12. The management method according to claim 10, wherein

the first evaluation value is the number of physical server devices in which the plurality of first virtual server devices are disposed after the migration, the physical server devices being included in at least one physical server device in which the plurality of second virtual server devices are disposed, and

the second evaluation value is the number of physical server devices in which the plurality of first virtual server devices are disposed after the migration, the physical server devices being included in at least one physical server device in which the plurality of third virtual server devices are disposed.

13. The management method according to claim 10, wherein

the first evaluation value is obtained by dividing the number of one or more physical server devices in which the plurality of first virtual server devices are disposed after the migration, the physical server devices being included in at least one physical server device in which the plurality of second virtual server devices are disposed, by a larger one of the number of physical server devices in which the plurality of first virtual server devices are disposed after the migration, and the number of physical server devices in which the plurality of second virtual server devices are disposed, and

the second evaluation value is obtained by dividing the number of one or more physical server devices in which the plurality of first virtual server devices are disposed after the migration, the physical server devices being included in at least one physical server device in which the plurality of third virtual server devices are disposed, by a larger one of the number of physical server devices in which the plurality of first virtual server devices are disposed after the migration, and the number of physical server devices in which the plurality of third virtual server devices are disposed.

14. The management method according to claim 10, wherein each of the plurality of physical storage devices includes a plurality of storage devices configuring a plurality of logical volumes, a memory, a controller and a port, and assigns the plurality of logical volumes, a virtual memory which is a partial area of the memory, a virtual controller obtained by logically dividing the controller, and a virtual port obtained by logically dividing the port, to the virtual storage devices and wherein the method further comprises the steps of:

retaining identification information of the virtual port of the virtual storage device;

instructing a physical storage device to which the first virtual storage device is migrated, to create a virtual storage device that has a virtual port having the same identifier as the virtual port of the first virtual storage device, by referring the identification information; and

issuing an instruction to migrate data stored in a volume assigned to the first virtual storage device before the migration, to a logical volume assigned to the created virtual server device.

15. The management method according to claim 10, wherein each of the plurality of physical storage devices includes a plurality of storage devices configuring a plurality of logical volumes, a memory, a controller and a port, and assigns the plurality of logical volumes, a virtual memory serving as a partial area of the memory, a virtual controller obtained by logically dividing the controller, and a virtual port obtained by logically dividing the port, to the virtual storage devices and wherein the method further comprises the steps of:

retaining identification information of the virtual port of the virtual storage device;

instructing a physical storage device to which the first virtual storage device is migrated, to create a virtual storage device that has a virtual port having the same identifier as the virtual port of the first virtual storage device to the identification information; and

issuing an instruction to migrate the data of a backup medium storing a replication of data used by a first virtual computer, to a logical volume assigned to the virtual server created in the physical storage device to which the first virtual storage device is migrated, when the number of virtual storage devices in an operated state, out of the virtual storage devices disposed in the physical storage device in which the first virtual storage device is disposed before the migration, exceeds a threshold value.