Patent ID: 8719269

Claim:
A configuration information management device that manages configuration information of an IT system, comprising: a configuration information memory stores a configuration item of the IT system indicative of information about a target of management, and an item relationship indicative of information about a connection between the configuration items independently of a different configuration information management device; a storage controlling unit, when one of a plurality of configuration information management devices accepts a request to enter a cluster that is configuration information about one IT system including a group of the configuration item of the IT system and the item relationship connected together, determines a destination to store the cluster from among the plurality of configuration information management devices, and controls to cause the configuration information memory of the configuration information management device determined to store the cluster, the configuration item indicating information including design information, product information, quality information and configuration information about the IT system; a search processing unit, when a search request to search for the configuration item or the item relationship is accepted, specifies a place where a cluster containing the target of the search is stored and retrieves the configuration item or the item relationship targeted for the search from the storage place of the cluster; an upper limit defining unit that defines an upper limit of a cluster size according to correspondence between a reduced number of times a search process is conducted across the clusters, and an increased number of configuration items and the item relationships in the clusters; and a cluster dividing unit, when a size of a cluster determined by the number of the configuration item and the item relationship in the cluster exceeds its upper limit, divides the cluster according to a frequency of reference made for the item relationship in the cluster, wherein the search processing unit calculates a sum of the frequency of reference.