Abstract: A virtual machine control device includes a processor configured to acquire usage information including an actual usage value of respective virtual machines operating on each of information processing apparatuses during each of past periods, and create, for each of the information processing apparatuses, prediction information including a prediction usage value of the respective virtual machines during each of periods. The processor is configured to determine, upon detecting a first virtual machine whose actual usage value is not included in the usage information, whether a first period exists, in which a sum of the actual usage value of the first virtual machine and prediction usage values of virtual machines operating on a first apparatus exceeds a criterion. The processor is configured to issue, upon determining that the first period exists, an instruction to move one of virtual machines operating on the first apparatus to a second apparatus before the first period.

Abstract: A non-transitory computer-readable storage medium storing therein a boot control program that causes a computer to execute a process includes storing booting process result data in which a first memory amount based on a sum of a memory amount allocated to a virtual machine that has been booted up and a memory amount allocated to a virtual machine to be booted up, and a boot processing time for booting the virtual machine to be booted up are associated with each other and determining a timing at which a booting process of a new virtual machine starts based on the boot processing time associated with the first memory amount having a correlation with a second memory amount based on a sum of a memory amount.

Abstract: An allocation control method includes: determining, for each of plural virtual machines executed on a first information processing apparatus or a second information processing apparatus, whether the virtual machine is executing a first processing that is performed in response to a request from an external apparatus; first allocating, to the first information processing apparatus, first virtual machines, which are executing the first processing, among the plural virtual machines; and second allocating, to the second information processing apparatus, second virtual machines, which are not executing the first processing, among the plural virtual machines.

Abstract: A virtual machine control device includes a processor configured to acquire usage information including an actual usage value of respective virtual machines operating on each of information processing apparatuses during each of past periods, and create, for each of the information processing apparatuses, prediction information including a prediction usage value of the respective virtual machines during each of periods. The processor is configured to determine, upon detecting a first virtual machine whose actual usage value is not included in the usage information, whether a first period exists, in which a sum of the actual usage value of the first virtual machine and prediction usage values of virtual machines operating on a first apparatus exceeds a criterion. The processor is configured to issue, upon determining that the first period exists, an instruction to move one of virtual machines operating on the first apparatus to a second apparatus before the first period.

Abstract: A system that compares first information corresponding to an amount of a first type of resource used when a first virtual machine is executed in an idle state with second information corresponding to an amount of the first type of resource used when a second virtual machine is executed, and determines whether the second virtual machine is in the idle state based on the comparison.

Abstract: A non-transitory computer-readable storage medium storing therein a boot control program that causes a computer to execute a process includes storing booting process result data in which a first memory amount based on a sum of a memory amount allocated to a virtual machine that has been booted up and a memory amount allocated to a virtual machine to be booted up, and a boot processing time for booting the virtual machine to be booted up are associated with each other and determining a timing at which a booting process of a new virtual machine starts based on the boot processing time associated with the first memory amount having a correlation with a second memory amount based on a sum of a memory amount.

Abstract: A control method includes acquiring result information including first timings and second timings, the first timings indicating time when each of a plurality of virtual machines started on an information processing device, and the second timings indicating time when each of the plurality of virtual machines ended, executing predictions regarding each of the plurality of virtual machines running on the information processing device, for each of periods, based on the result information, when a start of a new virtual machine on the information processing device is requested, determining for each of the periods whether the start of the new virtual machine is permitted based on a result of the predictions, by a processor, and when it is determined that the start is permitted, starting the new virtual machine on the information processing device.

Abstract: A computer is caused to execute a process including acquiring operating information relating to an operation situation within a predetermined period of a virtual machine operating on an information processing apparatus from a management machine that performs acquisition of the operating information and activation control of the virtual machine, and outputting, where a first period within which operating information of the virtual machine is not acquired is included in the predetermined period, operation actual results of the virtual machine within the first period based on operating information of the management machine within the first period and operating information of the virtual machine acquired at least at one of preceding and succeeding timings to the first period.

Abstract: An allocation control method includes: determining, for each of plural virtual machines executed on a first information processing apparatus or a second information processing apparatus, whether the virtual machine is executing a first processing that is performed in response to a request from an external apparatus; first allocating, to the first information processing apparatus, first virtual machines, which are executing the first processing, among the plural virtual machines; and second allocating, to the second information processing apparatus, second virtual machines, which are not executing the first processing, among the plural virtual machines.

Abstract: A system that compares first information corresponding to an amount of a first type of resource used when a first virtual machine is executed in an idle state with second information corresponding to an amount of the first type of resource used when a second virtual machine is executed, and determines whether the second virtual machine is in the idle state based on the comparison.

Abstract: During monitoring of a buffer configured so that expansion of an extent c of a buffer capacity takes place when the size of an unused region is reduced to a required expansion threshold value b, execution of a required calculation using an expansion threshold value b and buffer capacity extent c and c' (where c' is an initial value) for each point of time occurs. The reference values s1 and s2 corresponding to buffer capacities c and c' for each time point are determined and those reference values are used as the basis for screen display of expansion changes to the extent of the buffer capacity, thereby ensuring that a content of a display occurs corresponding to expansion for the extent of a buffer capacity. In addition, the use of the calculation formula for reference value s1 or s2 can be selected, while it is also possible to use a reference value (a fixed value ) which has been defined by the user.