Computer and Database Management Method

A database management method by which a computer that comprises a processor and a memory, and that provides a database management unit, manages a database,

• wherein the computer comprises a device connected to the processor through an interface,
• wherein the device comprises a non-volatile semiconductor storage device including a plurality of non-volatile semiconductor memories and storing the database, a database operation module that reads in the database from the non-volatile semiconductor storage device and performs an operation on the database, and a switch that connects the interface to a plurality of the non-volatile semiconductor storage devices and a plurality of the database operation modules, and
• wherein the management method comprises:
• a first step in which the database management unit receives a search request for the database;
• a second step in which the database management unit determines whether to perform a complete search by which the non-volatile semiconductor storage device to be accessed in the search request reads in an entirety of the database, or a partial search by which the database is partially read in;
• and
• a third step in which the database management unit refers to database operation module information that sets a relationship of a non-volatile semiconductor storage device, from among the plurality of non-volatile semiconductor storage devices, that can be accessed by the database operation module, and selects the database operation module or the non-volatile semiconductor storage device to be used from the database operation module information according to the determination results.