Double-controller communication system and method

Abstract

The invention discloses a double-controller communication system and a double-controller communication method, which are applied to a system consisting of two controllers. Hard disk controllers of the two controllers are directly connected to form a communication channel; and the application types of the data set in the two controllers are the same. The handshake process during data synchronization of the two controllers comprises that: a source controller initiates the data synchronization, packages the identifier and length information of the application types of the data to be synchronized into a data transmission request, and transmits the information to a target controller through the communication channel; and after receiving the data transmission request, the target controller distributes data buffer areas according to the identifier and length information of the application types in the data transmission request, and returns a response whether the distribution of the data buffer areas is successful to the source controller. By directly transmitting the data in the data buffer areas after the data transmission request is received, the data is not needed to be packaged and copied and the communication speed and efficiency between the double controllers are improved.

Description

technical field [0001] The invention relates to the field of storage disk arrays, in particular to a dual-controller communication system and method based on hard disk controllers. Background technique [0002] In a dual-controller communication system, the two controllers usually operate in Active-Active or Active-Standby mode. Regardless of the mode of operation, the two controllers must A large amount of data is exchanged, and it is required that according to the amount of exchanged data, the time delay of information exchange between two controllers should be controlled from milliseconds to seconds, so there is a high requirement for data exchange bandwidth. [0003] In the prior art, the domestic patent 200610137980.5 records that the method of using the hard disk controller to communicate between the two controllers is to transfer data from the controller to the hard disk controller in the form of an emulated Ethernet packet, and then from the hard disk controller to t...

AI Technical Summary

Problems solved by technology

Because this method adopts the Ethernet data transmission mode during data transmission, and realizes by simulating the OSI 7-layer model, the controller encapsulates the message and data into an IP data packet and sends it to the hard disk controller, and then sends it to the receiving end controller through the hard disk controller. The receiver controller decapsulates the IP packet after receiving it. Therefore, each communication and data synchronization needs to package and unpack the message and data. The processing is more complicated, and the communication speed still needs to be improved.

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