Packet switch device and message exchange system

A message exchange system comprising:

• a plurality of computing devices;
• and
• a packet switch device to which the plurality of computing devices is connected, wherein
• a computing device of the plurality of computing devices is configured to:
• receive a message from the packet switch device,
• store, in a first storage, information used for a calculation process, the information corresponding to each topic address included in the message,
• generate a usage status of the information stored in the first storage as reference processing information, and
• transmit the reference processing information to the packet switch device, and
• the packet switch device is configured to:
• store, in a second storage, a transmission table
• determine the computing device to which the message is to be transmitted, with reference to the transmission table based on a topic address included in the message,
• transmit the message to the computing device
• receive, from the computing device, reference processing information,
• calculate compatibility of the transmission table based on the received reference processing information, and
• update the transmission table based on the calculated compatibility of the transmission table, wherein
• the reference processing information indicates a usage status of information corresponding to each topic address when the computing device performs calculation, and
• the reference processing information includes use or nonuse of a message body corresponding to each topic address by the computing device.

A method for switching a packet, comprising:

• storing a transmission table in a storage;
• determining, by a processor, a computing device to which a message is to be transmitted, with reference to the transmission table based on a topic address included in the message;
• transmitting, by the processor, the message to the computing device;
• receiving, by the processor, from the computing device, reference processing information;
• calculating, by the processor, compatibility of the transmission table based on the received reference processing information;
• and
• updating, by the processor, the transmission table based on the calculated compatibility of the transmission table, wherein
• the reference processing information indicates a usage status of information corresponding to each topic address when the computing device performs calculation, and
• the reference processing information includes use or nonuse of a message body corresponding to each topic address by the computing device.