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Mirror image communication processing method

A technology of communication processing and mirroring information, which is applied in the field of communication, can solve problems such as unsuitable mirroring link applications, and achieve the effects of improving FC frame utilization, simplifying error handling procedures, and improving error handling efficiency

Inactive Publication Date: 2007-01-24
HUAWEI TECH CO LTD
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Problems solved by technology

[0019] The disadvantage of the SCSI processing mechanism introduced in the above-mentioned FC is that it is not suitable for the application of the "point-to-point" topology of the above-mentioned mirror link
Because the faults of the mirroring link are mainly the mirroring link interruption and the fault of the mirroring controller, and these two faults are limited to the FC layer and have no direct connection with SCSI, such as the reset target device in the SCSI standard error handling (such as disk) and resetting the FC card are completely unnecessary for these two failures

Method used

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Embodiment Construction

[0060] The present invention provides a mirroring communication processing method. The core of the present invention is: encapsulating the mirroring information in FC-2 (the two-layer structure of the fiber channel frame structure), and transferring the encapsulated information between mirror controllers Mirror information.

[0061] The method of this method includes two parts: the request issuing process of the mirror initiator and the response process of the mirror initiator.

[0062] The above two processing procedures are described in detail below with reference to the accompanying drawings. The processing procedures of the embodiment of the request issuance processing procedure of the mirror initiator in this method are as follows: Figure 6 As shown, including the following steps:

[0063] Step 6-1, the mirroring initiator first checks whether the mirroring link is faulty, if not, proceed to step 6-2; otherwise, when the number of mirroring links in a normal state is greater...

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Abstract

This invention provides a process method for mirror communication including: packaging mirror information in FC-2 to be transmitted among mirror controllers to increase the usability of FC frames and its performance of mirror communication.

Description

Technical field [0001] The invention relates to the field of communication, and in particular to a method for processing mirroring communication. Background technique [0002] At present, the connection diagram of a typical storage array controller is as follows: figure 1 Shown. The first controller and the second controller are connected by a mirror link. When one of the controllers fails, the other controller will take over its business. [0003] in figure 1 , The write data between the first controller and the second controller must always be consistent, that is, when the host writes a data A to the first controller, when the first controller saves the data A, The data A written by the host is also sent to the second controller through the mirror link from the first controller to the second controller. Only after the first controller receives the response of the data A returned by the second controller, the first controller continues the processing of the data A at the local...

Claims

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Application Information

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IPC IPC(8): H04L29/02H04L12/46H04B10/08G06F11/16H04L29/06
Inventor 张巍孙凌翔
Owner HUAWEI TECH CO LTD
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