Dynamic physical resource allocation in a networked system for migrating virtual computers

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.

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.