# US 2014/0157259 A1 · Common contiguous memory region optimized long distance virtual machine migration > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0157259 A1 - Document ID: US20140157259A1 - Status: Published application - Kind: A1 - Application number: 13/690,190 - Filed: 2012-11-30 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Assignees: International Business Machines Corporation - Applicants: International Business Machines Corporation - Inventors: Eli M. Dow; James P. Gilchrest; Steven K. Schmidt; Jessie Yu - Web page: https://patentgrep.com/patent/US20140157259A1 ## CPC - G06F 9/45558: {Hypervisor-specific management and integration aspects} - 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 Embodiments relate to migrating a virtual machine (VM) between work groups. A first machine in a first work group generates a migration request that identifies one or more contiguous memory regions used by the VM for operation. The first machine transmits the migration request to a plurality of work groups. The first machine receives a score from each of the plurality of work groups indicating a number of contiguous memory regions identified in the migration request that are available at the respective work group. A second work group in the plurality of work groups is identified as a destination for the VM based on the scores and a distance of the second work group from the first machine. A migration of the VM from the first machine to a second machine in the second work group is caused based on the identification of the second work group as the destination. ## Claims ### Claim at position 1 -7. (canceled) ### Claim 8 A system comprising: a plurality of work groups each comprising a plurality of virtual machines, the plurality of work groups comprising a first work group that includes a first machine with a virtual machine (VM) to be migrated, the system configured for: generating, by the first machine, a migration request that identifies one or more contiguous memory regions used by the VM for operation; transmitting, by the first machine, the migration request to other work groups included in the plurality of work groups; receiving, by the first machine, a score from each of the other work groups indicating a number of contiguous memory regions identified in the migration request that are available at the respective work group; identifying a second work group in the plurality of work groups as a destination for the VM based on the scores and a distance of the second work group from the first machine; and causing a migration of the VM from the first machine to a second machine in the second work group based on the identification of the second work group as the destination. ### Claim 9 (depends on 8) The system of claim 8, wherein the first work group includes an edge machine that is different from the first machine, and wherein the edge machine is configured to receive the scores from each of the other work groups. ### Claim 10 (depends on 8) The system of claim 8, wherein an edge machine included in the second work group is configured to generate the score for the second work group based on generating a memory map for the second work group. ### Claim 11 (depends on 10) The system of claim 10, wherein the memory map comprises an identification of each machine included in the second work group and a respective identification of contiguous memory regions stored at each machine included in the second work group. ### Claim 12 (depends on 10) The system of claim 10, wherein the memory map is configured to be circulated among each machine included in the second work group when generating the memory map. ### Claim 13 (depends on 10) The system of claim 10, wherein the edge machine is configured to select a destination machine in the second work group for the VM based on the memory map and the migration request. ### Claim 14 (depends on 13) The system of claim 13, wherein the edge machine is configured to coordinate access to the one or more contiguous memory regions used by the VM for operation for the destination machine. ### Claim 15 A computer program product comprising: a computer readable storage medium having program code embodied therewith, the program code readable by a processor to perform a method comprising: generating, by a first machine in a first work group, a migration request that identifies one or more contiguous memory regions used by a virtual machine (VM) for operation; transmitting the migration request to a plurality of work groups; receiving a score from each of the plurality of work groups indicating a number of regions identified in the migration request that are available at the respective work group; identifying a second work group in the plurality of work groups as a destination for the VM based on the scores and a distance of the second work group from the first machine; and causing a migration of the VM from the first machine to a second machine in the second work group based on the identification of the second work group as the destination. ### Claim 16 (depends on 15) The computer program product of claim 15, wherein the method comprises: determining an activity level for the VM, and identifying the second work group as the destination for the VM based on the activity level. ### Claim 17 (depends on 15) The computer program product of claim 15, wherein the method comprises: receiving, by an edge machine in the first work group, the scores from the plurality of work groups, identifying, by the edge machine, the second work group as the destination for the VM, and causing, by the edge machine, the migration of the VM from the first machine to the second work group. ### Claim 18 (depends on 15) The computer program product of claim 15, wherein the method comprises: causing, by an edge machine in the second work group, the migration of the VM to the second machine in the second work group based on a memory map associated with the second work group. ### Claim 19 (depends on 18) The computer program product of claim 18, wherein the method comprises: coordinating, by the edge machine, access to the one or more contiguous memory regions used by the VM for operation for the second machine in the second work group.