# US 9,519,512 B2 · Dynamic physical resource allocation in a networked system for migrating virtual computers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,519,512 B2 - Document ID: US9519512B2 - Status: Granted - Kind: B2 - Application number: 12/041,226 - Filed: 2008-03-03 - Published: 2008-09-11 - Granted: 2016-12-13 - Earliest claimed: 2007-03-08 - Assignees: NEC Corporation - Applicants: Nobuharu Kami - Inventors: Nobuharu Kami - Web page: https://patentgrep.com/patent/US9519512B2 ## CPC - G06F 9/4856: {resumption being on a different machine, e.g. task migration, virtual machine migration (G06F9/5088 takes precedence)} - G06F 9/45558: {Hypervisor-specific management and integration aspects} - 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)} - G06F 3/0689: {Disk arrays, e.g. RAID, JBOD} - G06F 2009/4557: {Distribution of virtual machine instances; Migration and load balancing} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A virtual machine configuration system, comprising a virtualizer for, in a virtualization environment in which a plurality of physical resources connected mutually through a network circuit has been arranged on a computer system sectioned into a plurality of partitions, dynamically changing a physical resource configuration and a virtual machine configuration while simultaneously controlling a configuration of the physical resources of the partition and a configuration of virtual resources allotted to virtual machines without exerting an influence over an application service operating on the virtual machine. ## Claims ### Claim 1 A virtual machine configuration system, comprising: a computer system sectioned into at least first and second partitions connected through a network circuit, said first partition including at least first and second hard discs which are registered therewith and a first memory, said second partition including at least a second memory; a virtual disc configured by mirroring said at least first and second hard discs; a virtualizer for migrating a virtual machine containing said virtual disc from said first partition to said second partition, said virtualizer: dividing a utilization time of each of said computer systems into time divisions and allotting said time divisions to a plurality of operating systems, thereby enabling each operating system to appear to operate simultaneously on a respective virtual machine; removing said first hard disc from said first partition and re-registering said first hard disc with said second partition; after removal of said first hard disc from said first partition and before completion of said re-registration of said first hard disc with said second partition, monitoring whether an access to said virtual disc has been requested and, if so, implementing a software emulation to emulate access to said virtual disc by performing a substitute operation comprising buffering data associated with said request; after said first hard disc has been re-registered with said second partition, converting a status of said virtual disc to a temporal wait status and writing said buffered data onto said re-registered first hard disc; copying memory data of said first memory on said first partition to said second memory on said second partition; and removing said second hard disc from said first partition and re-registering said second hard disc with said second partition. ### Claim 2 (depends on 1) The virtual machine configuration system according to claim 1, wherein said first and second hard discs are migrated using a dynamic bus controller. ### Claim 3 (depends on 1) The virtual machine configuration system according to claim 1, wherein said network circuit is Ethernet. ### Claim 4 (depends on 1) The virtual machine configuration system according to claim 1, wherein a virtual machine monitor is employed as said virtualizer. ### Claim 5 (depends on 1) The virtual machine configuration system according to claim 1, wherein software RAID 1 is employed as a way of synchronization. ### Claim 6 (depends on 1) The virtual machine configuration system according to claim 1, further comprising an external management server and management agent software which exists on each partition; and wherein an operation of said management agent software is performed in response to an issuance of a command to said management agent software from said external management server. ### Claim 7 A virtual machine configuration method for use with a computer system sectioned into at least first and second partitions connected through a network circuit, said first partition including at least first and second hard discs which are registered therewith and a first memory, said second partition including at least a second memory, said method migrating a virtual machine containing a virtual disc from said first partition to said second partition, said method comprising: dividing a utilization time of each of said computer systems into time divisions and allotting said time divisions to a plurality of operating systems, thereby enabling each operating system to appear to operate simultaneously on a respective virtual machine; removing said first hard disc from said first partition and re-registering said first hard disc with said second partition; after removal of said first hard disc from said first partition and before completion of said re-registration of said first hard disc with said second partition, monitoring whether an access to said virtual disc has been requested and, if so, implementing a software emulation to emulate access to said virtual disc by performing a substitute operation comprising buffering data associated with said request; after said first hard disc has been re-registered with said second partition, converting a status of said virtual disc to a temporal wait status and writing said buffered data onto said re-registered first hard disc; copying memory data of said first memory on said first partition to said second memory on said second partition; and removing said second hard disc from said first partition and re-registering said second hard disc with said second partition. ### Claim 8 (depends on 7) The virtual machine configuration method according to claim 7, wherein said first and second hard discs are migrated using a dynamic bus controller. ### Claim 9 (depends on 7) The virtual machine configuration method according to claim 7, wherein the network circuit is Ethernet. ### Claim 10 (depends on 7) The virtual machine configuration method according to claim 7, wherein software RAID 1 is employed as a way of synchronization. ### Claim 11 A program stored on a non-transitory, computer readable medium that causes an information processing unit to execute a virtualization process on a computer system sectioned into at least first and second partitions connected through a network circuit, said first partition including at least first and second hard discs which are registered therewith and a first memory, said second partition including at least a second memory, said virtualization process comprising: dividing a utilization time of each of said computer systems into time divisions and allotting said time divisions to a plurality of operating systems, thereby enabling each operating system to appear to operate simultaneously on a respective virtual machine; removing said first hard disc from said first partition and re-registering said first hard disc with said second partition; after removal of said first hard disc from said first partition and before completion of said re-registration of said first hard disc with said second partition, monitoring whether an access to a virtual disc, configured by mirroring said at least said first and second hard discs, has been requested and, if so, implementing a software emulation to emulate access to said virtual disc by performing a substitute operation comprising buffering data associated with said request; after said first hard disc has been re-registered with said second partition, converting a status of said virtual disc to a temporal wait status and writing said buffered data onto said re-registered first hard disc; copying memory data of said first memory on said first partition to said second memory on said second partition; and removing said second hard disc from said first partition and re-registering said second hard disc with said second partition.