Patent ID: 7788517
Filing Date: 2010-08-31
Classification: G06F

Abstract:
1. A cluster system comprising: a plurality of blade servers including at least one auxiliary blade server, the rest of said blade servers being used for actual operation of said cluster system; a power-supply unit capable of supplying electrical power to each of said blade servers; a power-supply controller which controls on/off in supplying electrical power to each of said blade servers from said power-supply unit; a blade server monitoring unit which monitors whether there occurs any trouble in each of said blade servers; wherein said power-supply controller, when said blade server monitoring unit finds a trouble occurring in anyone of said blade servers used for actual operation of said cluster system, stops power-supply to a blade server in which said blade server monitoring unit found a trouble, from said power-supply unit, and turns said auxiliary blade server or anyone of auxiliary blade servers if said blade servers include two or more auxiliary blade servers, into a blade server to be used for actual operation of said cluster system, in place of said blade server in which said blade server monitoring unit found a trouble, wherein said power-supply unit is comprised of a plurality of power-supply devices, wherein a number of said blade servers used for actual operation of said cluster system is N, said power-supply controller judges whether there is at least one power-supply device which does not supply electrical power to said blade servers when said power-supply unit supplies electrical power to said N blade servers, based on a number of said power-supply devices and a power-supply ability of said power-supply devices, when said power-supply controller does not judge that there is at least one power-supply device which does not supply electrical power to said blade servers when said power-supply unit supplies electrical power to said N blade servers, said power-supply controller causes said power-supply unit to supply electrical power to said blade servers used for actual operation of said cluster system in a first power-supply way in which said power-supply controller groups said blade servers used for actual operation of said cluster system into at least two groups, and further groups said power-supply devices into groups in a number identical with a number of and in association with said groups of said blade servers used for actual operation of said cluster system, and causes said power-supply device or devices belonging to a certain group to supply electrical power to said blade servers belonging to the associated group, when said power-supply controller judges that there is at least one power-supply device which does not supply electrical power to said blade servers when said power-supply unit supplies electrical power to said N blade servers, said power-supply controller causes said power-supply unit to supply electrical power to said blade servers used for actual operation of said cluster system in a second power-supply way in which said power-supply controller causes each of said power-supply devices to supply electrical power to each of said blade servers used for actual operation of said cluster system.