SERVER SYSTEM AND RESOURCE MANAGEMENT METHOD AND PROGRAM

• US 20130305243A1
• Filed: 11/12/2010
• Published: 11/14/2013
• Est. Priority Date: 11/12/2010
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Hiki, Yusuke
• Granted Patent: US 9,244,703 B2
• Time in Patent Office: Days
• US Class Current: 718/1
• CPC Class Codes: G06F 9/455 Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
• CPC Class Codes: G06F 9/45533 Hypervisors; Virtual machine monitors
• CPC Class Codes: G06F 9/5077 Logical partitioning of resources; Management or configuration of virtualized resources specific details on emulation or internal functioning of virtual machines G06F9/455

Abstract

A server system for providing a plurality of virtual machines constructed on a physical machine equipped with a physical resource, wherein each of the virtual machines includes: an OS recognizing the physical resource allocated to the virtual machine as a resource in the virtual machine; and a software management unit for securing the resource recognized by the OS and allocating the resource to a plurality of pieces of business application software registered in the virtual machine; wherein the software management unit identifies the plurality of pieces of business application software and allocates the resource to the plurality of pieces of business application software according to a preset policy to allocate the resource; and wherein when the software management unit detects an increase or decrease of the resource allocated to the virtual machine, it changes allocation of the resource to the plurality of pieces of business application software in accordance with an amount of the detected resource increase or decrease.

Claims

1. A server system for providing a plurality of virtual machines constructed on a physical machine equipped with a physical resource,

wherein each of the virtual machines includes:

an OS recognizing the physical resource allocated to the virtual machine as a resource in the virtual machine; and

a software management unit for securing the resource recognized by the OS and allocating the resource to a plurality of pieces of business application software registered in the virtual machine;

wherein the software management unit identifies the plurality of pieces of business application software and allocates the resource to the plurality of pieces of business application software according to a preset policy to allocate the resource; and

wherein when the software management unit detects an increase or decrease of the resource allocated to the virtual machine, it changes allocation of the resource to the plurality of pieces of business application software in accordance with an amount of the detected resource increase or decrease.

2. The server system according to claim 1, wherein the software management unit includes:

an identification unit for identifying the plurality of pieces of business application software;

a resource allocation unit for allocating the resource to the plurality of pieces of business application software identified by the identification unit in accordance with a preset policy to allocate the resource;

a resource management unit for securing the resource, which is allocated by the resource allocation unit, from the OS; and

a detection unit for detecting an increase or decrease of the resource allocated to the virtual machine;

wherein when the detection unit detects the increase or decrease of the resource allocated to the virtual machine,

the resource allocation unit changes the allocation of the resource to the plurality of pieces of business application software according to an increase or decrease amount of the resource, and

the resource management unit secures the resource, which has been allocated by the resource allocation unit, from the OS.

3. The server system according to claim 2, wherein the identification unit identifies the plurality of pieces of business application software and retains a list of the business application software in a business application software list management table.

4. The server system according to claim 2, wherein the identification unit identifies the plurality of pieces of business application software based on a program boundary which is a component unit or execution unit of a plurality of programs included in the business application software.

5. The server system according to claim 2, wherein the identification unit identifies the plurality of pieces of business application software based on location information of a plurality of programs included in the business application software.

6. The server system according to claim 2, wherein the software management unit includes a resource allocation policy management table in which a policy to allocate the resource is set to each of the plurality of pieces of business application software;

and

wherein the resource allocation unit allocates the resource to the plurality of pieces of business application software according to the policy to allocate the resource, which is set in the resource allocation policy management table, associates the business application software with an amount of the allocated resource, and retains them in a resource management table.

7. The server system according to claim 2, wherein the policy to allocate the resource, which is set in the resource allocation policy management table, is a ratio maintenance method of setting a ratio of resource which can be used for the plurality of pieces of business application software.

8. The server system according to claim 2, wherein the policy to allocate the resource, which is set in the resource allocation policy management table, is a sharing adjustment method of setting an upper limit value or lower limit value of a resource amount to each of the plurality of pieces of business application software and setting an amount of shared resource which can be used for any business application when the resource amount exceeds the set upper limit value or lower limit value.

9. The server system according to claim 2, wherein the resource management unit associates an amount of the resource secured from the OS with a resource amount actually used by the plurality of pieces of business application software and retains them in a resource usage management table.

10. The server system according to claim 2, wherein when the resource management unit frees the resource secured from the OS, it judges whether the resource is being used by the business application software or not;

and

if it is determined that the resource is being used by the business application software, the resource management unit frees the resource according to a type of the resource.

11. The server system according to claim 10, wherein the resource management unit detects a state, where the resource has not been used for a specified period of time, and frees the resource.

12. The server system according to claim 10, wherein the resource management unit secures an unused area by organizing or migrating used areas of the resource, thereby freeing the resource.

13. The server system according to claim 2, further comprising a hypervisor for providing the virtual machine on the physical machine equipped with the physical resource,

wherein when a resource amount of the virtual machine is changed by the hypervisor, the detection unit detects a change of the resource amount based on change information of the resource amount, which is issued from the hypervisor.

14. The server system according to claim 13, wherein when another apparatus separate from the server system is equipped with hypervisor management software for managing the resource amount of the virtual machine, and

when the resource amount of the virtual machine is changed by the hypervisor management software, the detection unit detects the change of the resource amount based on change information of the resource amount, which is issued from the hypervisor management software.

15. The server system according to claim 13, wherein the software management unit periodically obtains resource amount information of the OS;

and

wherein the detection unit detects the change of the resource amount by calculating a difference between the resource amount of the OS at present and the resource amount of the OS in the past.

16. A resource management method using a server system for providing a plurality of virtual machines constructed on a physical machine equipped with a physical resource,

wherein each of the virtual machines includes:

an OS recognizing the physical resource allocated to the virtual machine as a resource in the virtual machine; and

a software management unit for securing the resource recognized by the OS and allocating the resource to a plurality of pieces of business application software registered in the virtual machine;

wherein the resource management method comprising the steps executed by the software management unit;

identifying the plurality of pieces of business application software;

allocating the resource to the plurality of pieces of business application software according to a preset policy to allocate the resource; and

when detecting an increase or decrease of the resource allocated to the virtual machine, changing allocation of the resource to the plurality of pieces of business application software in accordance with an amount of the detected resource increase or decrease.

17. A program for making a computer function as a server system,

the server system including:

an identification unit for identifying a plurality of pieces of business application software registered in a virtual machine constructed on a physical machine equipped with a physical resource;

a resource allocation unit for allocating the resource to the plurality of pieces of business application software identified by the identification unit in accordance with a preset policy to allocate the resource;

a resource management unit for securing the resource, which is allocated by the resource allocation unit, from the OS in the virtual machine; and

a detection unit for detecting an increase or decrease of the resource allocated to the virtual machine;

wherein when the detection unit detects the increase or decrease of the resource allocated to the virtual machine,

the resource allocation unit changes the allocation of the resource to the plurality of pieces of business application software according to an increase or decrease amount of the resource, and

the resource management unit secures the resource, which has been allocated by the resource allocation unit, from the OS.