Hitachi, Ltd.

Atsushi Mitomi

Toshiaki Hirata

Akihiro Urano

Masaaki Oya

Kenichi Yoshida

Shigeru Miyake

An integrated database system comprises a plurality of database systems connected to one another through a network, each of the plurality of database systems managing its own stored data independently of the other database systems and accessing the stored data in accordance with an access request, and an integrated database unit connected to the network. The integrated database unit includes a directory database which stores a correspondence between each of the data stored in the plurality of database systems and a database system in which each of the data is stored, a directory control unit which acquires, by using the directory database, directory information corresponding to target data of the accepted access request, a database identifying unit which identifies a database system, and a database control unit which issues, on the basis of the acquired directory information, an access request to the database system having the target data of the accepted access request. The database system includes a database server unit which accesses a database in accordance with the access request issued by the integrated database unit.

Integrated database system and method for accessing a plurality of databases

An object integrated management system achieves flexibility for modifications of management targets, efficiency of integrated management processing, and reduction in system management, building, and maintenance costs. The object integrated management system manages real data managed by data management systems in an integrated manner, and comprises: a repository that stores virtual objects respectively created correspondingly to real data, virtual object metamodels defining the virtual objects, adapter objects having configuration information of the data management systems and a function of access processing for real data stored in the data management systems, and adapter object metamodels defining the adapter objects; a metamodel management part that manages the virtual object metamodels and adapter object metamodels within the repository; and an object management part that manages the virtual objects and adapter objects, and uses the adapter objects to access real data.

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Yokohama, Japan

Atsushi Mitomi