Dual-controller communication method, transmitting end controller and receiving end controller

Abstract

The invention provides a dual-controller communication method, a transmitting end controller and a receiving end controller. The dual-controller communication method includes the steps that according to the position and the size of a data written-in magnetic disk for data needing to be transmitted, the transmitting end controller applies a receiving buffer pool of the receiving end controller for receiving buffer space and obtains a buffer position pointer of the receiving buffer space; the transmitting end controller transmits the data needing to be transmitted to the applied receiving buffer space of the receiving end controller, and transmits the buffer position pointer of the receiving buffer space to the receiving end controller. The receiving end controller stores the received data in the receiving buffer space, and converts the received buffer position pointer into a local buffer data pointer, and transmits the data pointer to an RAID system stage by stage from a rolled data-caching mechanism. By means of the technical scheme, CPU resources of a computer and a bus bandwidth of an occupation system are saved, and the system processing performance is accordingly improved. The dual-controller communication method, the transmitting end controller and the receiving end controller are mainly suitable for dual-controller communication.

Description

technical field [0001] The invention relates to the field of computers, in particular to a dual-controller communication method, a sending-end controller and a receiving-end controller. Background technique [0002] Dual-controller communication is a communication method based on the sending-end controller and the receiving-end controller. In the existing dual-controller communication, the sending controller usually sends data from the sending window to the receiving window of the receiving controller, such as figure 1 As shown, the receiving window is the memory space allocated by the receiving controller. After receiving the data, the receiving controller copies the data from the receiving window to the volume data cache. And the pointer corresponding to the data is transferred from the volume data cache level by level to an inexpensive redundant disk array (RAID, Redundant Arrays of Inexpensive Disks) system. When the RAID system calculates and checks, it needs to perfo...

AI Technical Summary

Problems solved by technology

[0003] From the above-mentioned traditional dual-controller communication method, it can be seen that data needs to be copied twice from the receiving window to the disk, that is, the first copy is to copy the data from the receiving window to the volume data cache, and the second copy is to copy the data from the receiving window to the volume data cache. A copy is made when the page is aligned. In this way, the CPU resources of the computer and the bus bandwidth of the system will be consumed during the computer processing, thereby reducing the processing performance of the system.

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