Dynamic physical resource allocation in a networked system for migrating virtual computers
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.
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.
2. The virtual machine configuration system according to claim 1 , wherein said first and second hard discs are migrated using a dynamic bus controller.
3. The virtual machine configuration system according to claim 1 , wherein said network circuit is Ethernet.
4. The virtual machine configuration system according to claim 1 , wherein a virtual machine monitor is employed as said virtualizer.
5. The virtual machine configuration system according to claim 1 , wherein software RAID 1 is employed as a way of synchronization.
6. 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.
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.
8. The virtual machine configuration method according to claim 7 , wherein said first and second hard discs are migrated using a dynamic bus controller.
9. The virtual machine configuration method according to claim 7 , wherein the network circuit is Ethernet.
10. The virtual machine configuration method according to claim 7 , wherein software RAID 1 is employed as a way of synchronization.
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.