Migration control apparatus and migration control method

A computer-implemented migration control method comprising:

• acquiring a first communication log regarding a first virtual machine when execution of migration of the first virtual machine is not completed in a specific time;
• calculating, based on the acquired first communication logs, a first response time of a first processing request to the first virtual machine;
• acquiring a second communication log regarding the first virtual machine after lowering frequency of assignment of a computing resource to the first virtual machine to a first rate;
• calculating, based on the acquired second communication log, a second response time of a second processing request to the first virtual machine;
• calculating, based on the first response time, the second response time, the first rate, and an allowable range of a response time, a second rate to which the frequency of assignment of the computing resource to the first virtual machine is permitted to be lowered;
• after start of re-execution of the migration of the first virtual machine, calculating, based on a progress status of the re-execution, a third rate of the frequency of assignment of the computing resource for completing the re-execution;
• and
• determining, based on the second rate and the third rate, whether to cease the re-execution.

A non-transitory computer-readable medium storing instructions executable by one or more computers, the instructions comprising:

• one or more instructions for acquiring a first communication log regarding a first virtual machine when execution of migration of the first virtual machine is not completed in a specific time;
• one or more instructions for calculating, based on the acquired first communication logs, a first response time of a first processing request to the first virtual machine;
• one or more instructions for acquiring a second communication log regarding the first virtual machine after lowering frequency of assignment of a computing resource to the first virtual machine to a first rate;
• one or more instructions for calculating, based on the acquired second communication log, a second response time of a second processing request to the first virtual machine;
• one or more instructions for calculating, based on the first response time, the second response time, the first rate, and an allowable range of a response time, a second rate to which the frequency of assignment of the computing resource to the first virtual machine is permitted to be lowered;
• one or more instructions for, after start of re-execution of the migration of the first virtual machine, calculating, based on a progress status of the re-execution, a third rate of the frequency of assignment of the computing resource for completing the re-execution;
• and
• one or more instructions for determining, based on the second rate and the third rate, whether to cease the re-execution.