Master-salve switching method based on non-real-time operating system

Abstract

The invention discloses a master-salve switching method based on a non-real-time operating system. The method comprises the following steps: step 1) accomplishing clock and state synchronization of a master and a slave, and detecting the faults of the master and the slave; 2) if the master monitors a fault of itself, namely the master has a non-crash fault, sending master-salve switching information, and skipping to step 4); step 3) if the slave monitors no heartbeat packet of the master through the network, sending the master-salve switching information, and skipping to step 4); and step 4), changing a master-salve state identifier and realizing seamless master-salve switching. By adoption of the method provided by the invention, the situation that a switching instruction cannot be sent due to the crash of the master resulting in interruption of a system monitoring task is avoided, and the reliability of the system is improved.

Description

Technical field [0001] The invention belongs to the technical field of computer measurement and control, and particularly relates to a master-slave dual-computer switching method based on a non-real-time operating system. Background technique [0002] As the complexity of weapon equipment systems continues to increase, the requirements for test reliability are increasing. Many reliability designs for high-reliability electronic equipment rely on redundant design. Redundant design is the most commonly used effective means to improve equipment reliability. One is to use redundant design so that the overall reliability of the system will not be affected when a single component or system fails. [0003] Redundant design is a design technique that uses one or more identical units (systems) to form a parallel form. When one of them fails, the other units can still make the system work normally. [0004] Redundancy technology can be divided according to characteristics: hot redundancy / cold...

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Problems solved by technology

[0006] At present, in the master-slave switching method of redundant design, usually when the master fails, it automatically switches to the slave, and then switches to the master after the master returns to normal. This method is suitable for data acquisition, network data communication, etc. Redundant backup of tasks, but in some bus systems, the sending and receiving of instructions can only be controlled by the host. In this case, the method of dual-computer parallel work mentioned above is not applicable, so a host Slave switching method

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