Patent ID: 7921325

Claim:
A node management device comprising: a storage resource that stores resource information, for each of three or more nodes that run an application and issue an I/O request to a storage device, wherein said resource information relates to a resource used by said application, and includes a number of active paths, which is a number of active paths from among a plurality of paths used by said application, for each of said nodes; a reception unit that receives resource condition information, wherein said resource condition information indicates variation in a condition of said resource from each of said nodes, includes fault information indicating a fault or a fault recovery in a path from said plurality of paths, and includes node information specifying the node that detects said fault or said recovery; an updating unit that updates said resource information on the basis of said resource condition information received by updating said number of active paths corresponding to said node specified by said node information in said resource information on the basis of said fault information and said node information; a determination unit that determines a following active node by determining, on the basis of said updated resource information, that a node having the largest number of active paths, from among nodes other than a current active node, is the following active node; and a notification unit that notifies at least one of said three or more nodes of information indicating said following active node determined by said determination unit.