A synchronous detection and failure separation method for dual control high-availability system

Abstract

The invention provides a method of synchronous detection and failure isolation for a double control highly available system. The system is provided with two controllers which use special channels integrated on a PCI mainboard, serial ports or network card cables to monitor the HADaemon process of the counterpart. When a failure appears, a primary controller and a secondary controller conduct the following control steps of: 1), the primary controller releases virtual IPs of a server and the secondary controller takes over the IPs through ARP deception; 2), the resources of the main controller are hung and send state information to the primary controller, and a related service is started to realize seamless switching; 3), during the taking over of IP and the switching of servers, an alarm is given in an email log; 4), the primary controller after restoration choose takeover service or no takeover as a backup of synchronous detection; 5), in order to improve the availability of heartbeat transmission, network cards and serial ports are used together to avoid single point failure of a link; 6), a failure occuring in a network for external services of the primary controller can also be detected by the HADaemon which then triggers the primary controller to take over the virtual IP and switch the resources.

Description

1. Technical field [0001] The invention relates to the field of computer systems and communications, in particular to a method for realizing high availability of a dual-controller system. 2. Technical background [0002] In order to improve the high availability of the storage system, dual controllers are generally used to ensure the high availability of the system. According to the relationship between the two controllers, it can be divided into A / A mode and A / P mode. [0003] The characteristic of A / P mode is what we traditionally think of as master-slave hot backup. When the master controller fails, the slave controller takes over the IP address and services of the controller, so as to achieve high availability of the system. The disadvantage of this mode is If the two controllers are not fully utilized, the slave controller is idle during normal operation, resulting in waste of resources; [0004] The characteristic of A / A mode is that there is no master-slave distinct...

AI Technical Summary

Problems solved by technology

However, the problem faced by this mode is how to solve the problem of synchronous status detection and instant communication between dual controllers, and how to perform real-time fault isolation

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