DISTRIBUTED DATA MANAGEMENT DEVICE AND DISTRIBUTED DATA OPERATION DEVICE

An object logical node achieved by a distributed data management device includes a storage unit for storing object node identifiers each uniquely assigned to a plurality of logical nodes, a storage unit for storing at least one of a plurality of partial data units, a link table for storing link information between the object logical node and a link destination logical node, a storage unit for storing a value range boundary value with respect to each attribute corresponding to the partial data unit, and a storage unit for storing a tree structure data unit with respect to each attribute including a plurality of tree nodes each indicating a value range for identifying the logical node storing the partial data unit corresponding to an access request, the tree structure data unit including a root tree node including at least one entry formed with a pointer pointing to a child tree node associated with the link destination logical node and a value indicating a value range for selecting the pointer.