Duplicate hot standby method of embedded system

Abstract

The invention relates to a duplicate hot standby method of an embedded system, and belongs to the technical field of embedded systems. The method comprises the following steps: firstly adopting the "firstly started being the main" active / standby computer identity identification mechanism to confirm the identity of active / standby computers; configuring two heartbeat wires for the heartbeat communication between the active / standby computers, and creating a mutual exclusion signal amount on the host in a normal working state so as to determine that only one machine is in a working state at present, thereby avoiding the occurrence of the double host phenomenon; establishing an active / standby computer synchronous communication mechanism, and ensuring the states of the active / standby computers and the real-time communication of received data; and monitoring the working states of the active / standby computers in real time, diagnosing the system faults in time, and adopting an automatic active / standby computer switching algorithm to achieve a duplicate hot standby function.

Description

Technical field [0001] The invention relates to the technical field of embedded systems, in particular to a dual-computer hot backup method for embedded systems. Background technique [0002] At present, the most common dual-machine fault tolerance technologies include: diskless, shared disk, disk mirroring, shared and mirrored coexistence, NAS (Network Attached Storage) connected shared and hybrid (shared disk mirroring), etc. Most of the methods are used in dedicated fault-tolerant systems, but less in general fault-tolerant systems. Most of the above methods implement fault tolerance at the application layer, so the following problems will inevitably arise: [0003] 1. Increase the workload of the designer. The designer must consider the realization of fault tolerance while realizing specific business; [0004] 2. The reliability of data fault tolerance is difficult to guarantee. As long as the designer has poor consideration, it may cause the fault-tolerant system to fail to b...

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Problems solved by technology

[0003] 1. Increase the workload of designers. Designers must consider the realization of fault-tolerant functions while realizing specific services;

[0004] 2. The reliability of data fault tolerance is difficult to guarantee

As long as the designers do not consider carefully, it may cause the fault-tolerant system to fail to back up correctly, resulting in backup failure;

[0005] 3. The scalability of the system is poor. Once a new function is added to the system, the designer must reconsider the realization of the backup function. The testability and maintainability of the system are poor

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