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SCSI distributed communication module

A distributed communication and model technology, applied in transmission systems, electrical components, etc., can solve problems such as insufficient understanding, troubles in lower-layer transmission protocols, inability to store product self-characteristic development, etc., and achieve the effect of development and convenience, and development simplification

Inactive Publication Date: 2009-12-16
ZTE CORP
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Problems solved by technology

from figure 1 It can be seen from the figure that in the existing SCSI distributed communication model, the SCSI transmission protocol layer provides a service interface for the upper application layer. In actual use, different transmission protocols can be selected according to different transmission requirements, but no matter which transmission protocol is selected For different protocols, application layer developers need to write the corresponding interfaces of each protocol for use by the application layer. However, application layer developers often do not have a deep understanding of specific protocols, which in turn affects the development of upper-layer applications.
Therefore, application layer developers under the existing SCSI distributed communication model cannot focus on the development of self-characteristics of storage products, and are often troubled by complicated lower-layer transmission protocols

Method used

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Embodiment Construction

[0017] figure 1 It has been described in the background technology, and will not be repeated here. Combine below figure 2 , image 3 The present invention is further described.

[0018] refer to figure 2 , a SCSI distributed communication model, including an application layer, a transport protocol layer, an interconnection layer, and an SCA layer located between the application layer and the transport protocol layer. The SCA layer abstracts a unified public interface from the different transmission protocols of the lower layer, so that upper-layer users can ignore the specific implementation of the lower-layer protocol during the storage project development process, and only need to call the public interface provided by the SCA layer to implement their own on this basis Application development; when the transmission protocol of the lower layer is changed, it only needs to be modified accordingly at the SCA layer, without any impact on the development of the upper layer a...

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Abstract

The invention discloses an SCSI distributed communication module comprising an application layer, a transmission protocol layer, an interconnection layer and an SCA layer. The SCA layer is arranged between the application layer and the transmission protocol layer and comprises a public interface for realizing the bidirectional communication with the application layer, and a plurality of instruction-processing modules for processing SCSI instructions of different protocols; and the instruction-processing modules respectively realize the bidirectional communication between the public interface and the transmission protocol layer. The invention adopts the technical scheme so that the development of the application layer can be independent of the transmission protocols.

Description

technical field [0001] The invention relates to a communication model, in particular to a SCSI (Small Computer System Interface, small computer system interface) distributed communication model. Background technique [0002] SCSI is a high-performance computer peripheral interface, and its main function is to transfer commands, status and block data between the host and storage devices. The SCSI system is a distributed system that adopts the client / server model, and its distributed communication model is based on layered technologies, such as figure 1 As shown, each layer of the model consists of two peer-to-peer entities (one as the Initiator (initiator) and the other as the Target (target)), using a specific protocol to communicate with each other. The lower-layer protocol provides services to the upper-layer protocol, and the upper-layer protocol uses the lower-layer services to implement its protocol. [0003] The SCSI transport protocol service is realized by using th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06
Inventor 刘婷
Owner ZTE CORP
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