Computer system and method for controlling communication path

A control method for a communication path of a computer system including a plurality of computers, wherein

• the plurality of computers having at least one arithmetic device, at least one storage device coupled to the at least one arithmetic device, and a plurality of communication devices coupled to the at least one arithmetic device,
• the plurality of computers includes:
• a first computer having a first processing unit configured to use a storage region to perform processing;
• a second computer having a second processing unit configured to provide the storage region, manage a first port for communication with the first processing unit, and process a processing request to the storage region that has been accepted via the first port;
• and
• a third computer having a third processing unit configured to manage a second port for communication with the first processing unit, and notify the first computer, of the first port for redirecting serving as a redirect destination of the connection request in a case of receiving the connection request for establishment of a communication path connecting the first processing unit and the second processing unit via the second port,
• the third processing unit holds port management information for managing a correspondence relationship of the first port and the second port, and
• the control method of the communication path includes:
• a first step of transmitting, by the first processing unit, the connection request to the second port;
• a second step of selecting, by the third processing unit, the first port for redirecting on the basis of the port management information in a case of receiving the connection request, and transmitting a response for notifying of the first port for redirecting to the first processing unit;
• and
• a third step of receiving, by the first processing unit, a response for notifying the first port for redirecting from the third processing unit and transmitting the connection request to the first port for redirecting to establish the communication path.