Two-computer hot backup switching method and hot backup system based on soa and rs485 bus

Abstract

The invention discloses a double machine warn backup switching method achieved based on the SOA and the RS485 bus. A console system takes charge of processing switch between a host and a slave machine, the distributed storage of data, and coordinating the work of the host and the slave machine of a generating station monitoring system; the host and the slave machine judge whether or not the slave machine or the host is abnormal through messages sent by the console system and / or a heartbeat line, if the slave machine or the host is abnormal, tasks of the other side are taken over; both the host and the slave machine start all of the threads of the tasks, wherein the host mainly undertakes a data checking task, the slave machine monitors the host, receives monitoring data simultaneously, conducts filtering process on the data, and merely receives the data sent upward by smart monitoring equipment of a lower computer. The invention further discloses a double machine warm backup system achieved based on the SOA and the RS485 bus. The double machine warm backup system achieved based on the SOA and the RS485 bus comprises the console system, the host and the slave machine. The host and the slave machine can be operated simultaneously, all of task processes are in a starting state, and synchronous backup is performed on the data in a database through the console system at any time. In the process of switch, the problems of starting and loss of the data are unnecessary to consider, and therefore time is saved for double machine switch.

Description

technical field [0001] The invention relates to a switching method and a hot backup system realized based on SOA and RS485 bus. Background technique [0002] With the development of industrial control technology, the application of real-time monitoring software is becoming more and more widespread. The monitoring software keeps monitoring the on-site data at all times. Therefore, it is necessary to maintain high reliability of the monitoring software at all times. Once the software fails, real-time data will be lost. have serious consequences. However, in this type of system, due to reasons such as the rationality of the design of each part and the reliability of the hardware, it is impossible to guarantee that the system is absolutely stable and reliable without any problems. Therefore, in such a system, in addition to optimizing the program itself, A system backup is usually the solution of choice. When the system fails, switch to another system, and design an effective ...

AI Technical Summary

Problems solved by technology

Generally speaking, it takes about 5-20 seconds. If the system cache is too large, it will increase the time for the host to write back the cache, and the switching time will be longer

[0005] 2. When the standby machine takes over the main machine, it is necessary to start the user application program or database program of the standby machine

The safety threshold of this detection time is generally set at about 12 seconds. At the same time, some data will inevitably be lost.

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