Memory database, memory database system and memory database update method

摘要

PPROBLEM TO BE SOLVED: To provide a memory database system for minimizing reduction in data access performance and consumption of CPU resources and memory resources while preventing data destruction by users. PSOLUTION: A shared memory region 100 is provided with a reference region 110 only for referring to a user application program 200, an update region 120 for referring to and updating the user application program 200, and a commit execution daemon 300 for referring to and updating the reference region 110 and the update region 120. The reference region 110 stores master data 111. Difference data 122 when the user application program 200 updates the master data 111 is stored in the update region 120. The commit execution daemon 300 updates the master data 111 using the difference data 122. PCOPYRIGHT: (C)2010,JPO&INPIT