NETWORK SYSTEM AND ITS LOAD DISTRIBUTION METHOD

摘要

A network system includes a plurality of first computers, which transmit and receive data via a network and are equipped with a plurality of active and standby communication paths. A second computer is connected with the first computers via the network. Each first computer acquires path information concerning active and standby communication paths in the network and traffic of the active communication path and transmits them to the second computer. The second computer: predicts a load on each network node when the communication path is to be switched to each standby communication path; selects a first computer, whose communication path should be switched, and a standby communication path, which is a switching target, based on the prediction result; and requests the first computer to switch the communication path to the standby communication path.

主权项

1. A load distribution method for distributing loads on a plurality of network nodes in a network system including a network composed of the plurality of network nodes, a plurality of first computers for transmitting and receiving data via the network, and a second computer connected to the first computers via the network,
wherein the first computers include an active communication device for performing communications via the network and at least one standby communication device and the active communication device and the standby communication device are connected to another network node, respectively, in the network, wherein the network system load distribution method comprising: a first step, executed by the first computer, of acquiring path information concerning an active communication path and a standby communication path in the network and traffic of the active communication path; a second step, executed by the first computer, of transmitting the acquired path information concerning the active communication path and the standby communication path and the traffic of the active communication path, respectively, to the second computer; a third step, executed by the second computer, of searching for a network node with a heavy load among the respective network nodes constituting the network based on the path information concerning the active communication path and the standby communication path and the traffic of the active communication path which are transmitted from the first computer; and a fourth step executed, upon detecting the network node with the heavy-load, by the second computer: predicting a load on each of the network nodes when the communication path of each first computer is to be switched to its individual standby communication path; selecting the first computer, whose communication path should be switched from the active communication path to the standby communication path, based on a result of the prediction and the standby communication path which should be a switching target of the communication path for the first computer; and requesting the selected first computer to switch the communication path from the active communication path to the selected standby communication path.