The system of backup copy to a real-time database in a primary memory in operation.

摘要

Invention patent "system of backup copy to a real-time database in a primary memory in operation.For the establishment of the backup copy in a database in real time distributed in primary memory in operation.All the data in the database are structured as belonging to one of several logical databases, a database logic is susceptible, but not requiring.Extend across multiple processors.A function backup copy of a particular database logic is activated emitting a message for a manipulator of copy of the central reserve.It has information relating to the processors through which the system backup copy of the current extends, and synchronizes the copy function reservation through the limits of the processor.The synchronization includes the manipulators of the local database are informed that the backup copy is started and a new record of transactions is being created.In which all the transactions that have not reached the state of recovery and therefore should not be included in the backup copy are recorded.The backup copy subsequently only contains changes in transactions in the old record of transactions.