Site management apparatus and management method

1. A site management apparatus that manages a plurality of sites, including an on-premise data center infrastructure and cloud providers, each capable of storing data and executing a workload being a computer workload using the data to improve the utilization rate of renewable energy and reduction of overhead pursuant to a workload migration, the site management apparatus comprising:

a processor; and

a memory,

wherein the memory stores energy management information that indicates, for each site, a forecast value of a supply amount, which is an amount of power generated by renewable energy and supplied to the site, and a forecast value of a demand amount, which is an amount of power consumed at the site, and workload management information that indicates, for each workload, a power consumption amount, which is an amount of power consumed by the workload, data management information related to the data used by the workload, and an execution site, which is the site at which the workload is executed, and

wherein the processor is configured to calculate, based on the energy management information, an adjustment amount for adjusting the demand amount consumed at a first site by migrating the execution site from the first site to a second site, select, based on the adjustment amount and the workload management information, a migration target workload, which is a workload whose execution site is to be migrated to the second site, from among workloads executed in the first site, and generate migration plan information indicating the migration target workload.

2. The site management apparatus according to claim 1 , wherein the processor is further configured to select, based on the workload management information, a candidate workload to be a candidate for the migration target workload and select, as the migration target workload, the candidate workload in descending order of the power consumption amount consumed by the candidate workload until a total of the power consumption amounts reaches the adjustment amount.

3. The site management apparatus according to claim 2 , wherein

the data management information indicates a copy destination site that is the site in which a copy of the data is stored, and

the processor is further configured to select, as the candidate workload, the workload whose copy destination site is the second site.

4. The site management apparatus according to claim 2 , wherein

the data management information indicates a presence or an absence of the data, and

the processor is further configured to select, as the candidate workload, the workload without the data.

5. The site management apparatus according to claim 2 , wherein

the data management information indicates a data amount of the data, and

the processor is further configured to calculate, based on the data amount, a cost for copying the data from the first site to the second site and select, as the candidate workload, the workload whose cost is equal to or smaller than a threshold.

6. The site management apparatus according to claim 5 , wherein the cost is at least one of an amount of power and time.

7. The site management apparatus according to claim 2 , wherein

the workload management information further indicates survival time, which is a time period during which the workload is continuously executed, and

the processor is further configured to select, as the candidate workload, the workload whose survival time is equal to or longer than a reference time period.

8. The site management apparatus according to claim 1 , wherein the processor is further configured to:

generate the migration plan information at a predetermined time, predict, based on the energy management information, whether the execution site is likely to be returned from the second site to the first site within a predetermined time period after the predetermined time,

maintain, when the processor predicts that the execution site is likely to be returned, the data stored in the first site upon migrating the execution site based on the migration plan information, and

delete, when the processor predicts that the execution site is unlikely to be returned, the data stored in the first site upon migrating the execution site based on the migration plan information.

9. A management method performed by a site management apparatus that manages a plurality of sites, including on-premise data center infrastructures and cloud providers, each capable of storing data and executing a workload being a computer workload using the data to improve the utilization rate of renewable energy and reduction of overhead pursuant to a workload migration and that includes a processor and a memory, the management method comprising:

causing the memory to store energy management information that indicates, for each site, a forecast value of a supply amount, which is an amount of power generated by renewable energy and supplied to the site, and a forecast value of a demand amount, which is an amount of power consumed at the site, and workload management information that indicates, for each workload, a power consumption amount, which is an amount of power consumed by the workload, data management information related to the data used by the workload, and an execution site, which is the site at which the workload is executed; and

causing the processor to calculate, based on the energy management information, an adjustment amount for adjusting the demand amount consumed at a first site by migrating the execution site from the first site to a second site, to select, based on the adjustment amount and the workload management information, a migration target workload, which is a workload whose execution site is to be migrated to the second site, from among workloads executed in the first site, and to generate migration plan information indicating the migration target workload.