Virtual machine placement within a server farm

1. A method for placement of a virtual machine within a plurality of servers, the method comprising:

using at least a processor and memory for:

determining a memory requirement of the virtual machine;

determining a memory availability of one or more nodes of each of the servers, each node having a processor and memory accessible by the respective processor;

determining a first node set with available memory and a second node set with available memory that are within different servers and that each meet the memory requirement of the virtual machine;

determining which of the first and second node sets has the least number of nodes with available memory; and

placing the virtual machine within the one of the first and second node sets that has the least number of available nodes.

2. The method of claim 1 , wherein determining the memory availability comprises determining an amount of memory available within at least one of the one or more nodes of the plurality of servers.

3. The method of claim 1 , wherein placing the virtual machine comprises placing the virtual machine within a single physical server among the plurality of servers.

4. The method of claim 1 , wherein determining the memory availability comprises determining the memory availability based on a uniform memory access availability.

5. The method of claim 1 , wherein the plurality of servers comprises a plurality of non-uniform memory access servers.

6. The method of claim 5 , wherein the plurality of non-uniform memory access servers are configured to operate in a server farm.

7. The method of claim 5 , wherein the plurality of non-uniform memory access servers are configured to utilize a cache coherent interconnect.

8. The method of claim 1 , further comprising using the at least one processor and memory for selecting the virtual machine for migration.

9. The method of claim 8 , further comprising using the at least one processor and memory for migrating the virtual machine from a first server of the plurality of servers to a second server of the plurality of servers.

10. The method of claim 8 , further comprising using the at least one processor and memory for generating a list of candidate servers of the plurality of servers for placement of the virtual machine.

11. The method of claim 10 , wherein placing the virtual machine comprises migrating the virtual machine from a first server of the plurality of servers to a second server among the list of candidate servers based on the determined memory requirement and the determined memory availability.

12. A system for placement of a virtual machine within a plurality of servers, the system comprising:

a virtual machine placement manager comprising a processor and memory and configured to execute and respond to placement requests; and

a resource manager comprising a processor and memory and configured to:

determine a memory requirement of the virtual machine;

determine a memory availability of one or more nodes of each of the servers, each node having a processor and memory accessible by the respective processor;

determine a first node set with available memory and a second node set with available memory that are within different servers and that each meet the memory requirement of the virtual machine;

determine which of the first and second node sets has the least number of nodes with available memory; and

place the virtual machine within the one of the first and second node sets that has the least number of available nodes.

13. The system of claim 12 , wherein the resource manager is configured to place the virtual machine within a single physical server among the plurality of servers.

14. The system of claim 12 , wherein the resource manager is configured to determine the memory availability based on a uniform memory access availability.

15. The system of claim 12 , wherein the plurality of servers comprises a plurality of non-uniform memory access servers.

16. The system of claim 12 , wherein the plurality of non-uniform memory access servers are configured to utilize a cache coherent interconnect.

17. The system of claim 12 , wherein the resource manager is configured to: select the virtual machine for migration; and

migrate the virtual machine from a first server of the plurality of servers to a second server of the plurality of servers.

18. The system of claim 12 , wherein the resource manager is configured to:

select the virtual machine for migration;

generate a list of candidate servers of the plurality of servers for placement of the virtual machine; and

migrate the virtual machine from a first server of the plurality of servers to a second server among the list of candidate servers based on the determined memory requirement and the determined memory availability.

19. A computer program product for placement of a virtual machine within a plurality of servers, said computer program product comprising:

a computer readable non-transitory storage medium having computer readable program code embodied therewith, the computer readable program code comprising:

computer readable program code configured to:

determine a memory requirement of the virtual machine;

determine a memory availability of one or more nodes of each of the servers, each node having a processor and memory accessible by the respective processor;

determine a first node set with available memory and a second node set with available memory that are within different servers and that each meet the memory requirement of the virtual machine;

determine which of the first and second node sets has the least number of nodes with available memory; and

place the virtual machine within the one of the first and second node sets that has the least number of available nodes.