DEVICE FOR DISTRIBUTING LOAD AND METHOD FOR ESTIMATING LOAD

摘要

PROBLEM TO BE SOLVED: To realize dynamic load distribution method capable of realizing appropriate load distribution even when a sudden increase of accesses to a server takes place unexpectedly in a WWW system in which service requests from clients are subjected to load distribution to a plurality of servers. SOLUTION: The load distribution is performed on the basis of the real time load state of the servers in such a manner that a load distributing device has a means for estimating load magnitude that the service requests give to the servers from the header information of service request packets and a means for managing an estimated value in each allocated server. The load distributing device is also preliminarily provided with a load estimate table generating means for estimating a load, and the entire server system can thereby maintain high performance without allowing excessive communication and load monitoring processing take place at the time when the server system operates.