System, information processing device, program, and management method

An information processing device, comprising:

• a storage unit which stores target-related data received from an origin node which stores a plurality of pieces of target-related data;
• a service provision unit which, if the target-related data corresponding to a provision target, which is a target to which a service is provided, is stored in the storage unit, provides a service using the target-related data to the provision target;
• if the target-related data corresponding to the provision target is not stored in the storage unit and is stored in a relay node higher than the information processing device among a plurality of relay nodes located at a level between the origin node and the information processing device, provides a service using the target-related data to the provision target and stores the target-related data in the storage unit;
• and if the target-related data corresponding to the provision target is not stored in the storage unit and the relay nodes and is stored in the origin node, provides a service using the target-related data to the provision target and stores the target-related data in the storage unit;
• and
• a bottom management unit which deletes, from the storage unit, the target-related data meeting a predetermined condition, among the target-related data stored in the storage unit, and reports the deleted target-related data to a higher one of the relay nodes.

A non-transitory computer-readable storage medium which stores a program which causes a computer to function as:

• a storage unit which stores target-related data received from an origin node which stores a plurality of pieces of target-related data;
• a service provision unit which, if the target-related data corresponding to a provision target, which is a target to which a service is provided, is stored in the storage unit, provides a service using the target-related data to the provision target;
• if the target-related data corresponding to the provision target is not stored in the storage unit and is stored in a relay node higher than an information processing device among a plurality of relay nodes located at a level between the origin node and the information processing device, provides a service using the target-related data to the provision target and stores the target-related data in the storage unit;
• and if the target-related data corresponding to the provision target is not stored in the storage unit and the relay nodes and is stored in the origin node, provides a service using the target-related data to the provision target and stores the target-related data in the storage unit;
• and
• a bottom management unit which deletes, from the storage unit, the target-related data meeting a predetermined condition, among the target-related data stored in the storage unit, and reports the deleted target-related data to a higher one of the relay nodes.

A management method performed by a computer, comprising:

• storing, in a storage unit, target-related data received from an origin node which stores a plurality of pieces of target-related data;
• if the target-related data corresponding to a provision target, which is a target to which a service is provided, is stored in the storage unit, providing a service using the target-related data to the provision target;
• if the target-related data corresponding to the provision target is not stored in the storage unit and is stored in a relay node higher than the computer among a plurality of relay nodes located at a level between the origin node and the computer, providing a service using the target-related data to the provision target and stores the target-related data in the storage unit;
• and if the target-related data corresponding to the provision target is not stored in the storage unit and the relay nodes and is stored in the origin node, providing a service using the target-related data to the provision target and stores the target-related data in the storage unit;
• and
• performing bottom management by deleting, from the storage unit, the target-related data meeting a predetermined condition, among the target-related data stored in the storage unit, and reporting the deleted target-related data to a higher one of the relay nodes.