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SAN dual-node image schooling method and system based on FCP protocol

A dual-node, mirroring technology, applied in the field of network storage, can solve the problems of host waste, incomplete data consistency, data storage capitalization delay, etc., and achieve the effect of improving efficiency and reducing memory copy

Inactive Publication Date: 2009-03-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the data replication method based on the dual-node Cluster is that the replication of the distributed storage medium will cause a waste of the host (Host) nodes, and the use of Ethernet as the transmission link for data replication will introduce a large amount of resources to the data storage. write latency of
The disadvantage of the asynchronous mirroring method based on file system snapshots is that the system will introduce incomplete data consistency, that is, the mirrored data cannot maintain complete real-time (up-to-date)

Method used

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  • SAN dual-node image schooling method and system based on FCP protocol
  • SAN dual-node image schooling method and system based on FCP protocol
  • SAN dual-node image schooling method and system based on FCP protocol

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Embodiment Construction

[0053] The architecture of the system consists of figure 1 As shown, the data on the I / O node machine and the mirror (Mirror) I / O node machine maintain complete consistency. Data travels through paths (1)(4) (see figure 1 ) to the I / O node for storage, and at the same time the I / O node copies the mirrored data through the path (3)(5) (see figure 1 ) to the mirrored I / O node to store the mirrored data.

[0054] The system includes three core modules: mirror storage module; disaster recovery processing module; re-synchronization module.

[0055] 1. Mirror storage module

[0056] The mirror storage module provides front-end host nodes for mirror storage, which ensures the normal execution of I / O operation requests of the host nodes, and generates real-time data replication, and performs redundant storage on the mirror I / O nodes. Before the mirror module works, it is necessary to configure the mapping relationship between the mirror disk and the mirrored disk through the manag...

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Abstract

Characters of the invention related to network memory technology area are that based on own developed FC-SAN system, synchronous remote mirrored image is realized in ScrverFree mode completely by using method of two stage double storage node cluster in two stage of memory; mirrored procedure is shielded from host system, does not use any resources of host cluster, and only tiddly write delay of mirrored image is introduced; the mechanism provides data service sequentially when a node is disabled, and provides resynchronization of background data after system reconstruction so as to meet guarantee of data security. The invention possesses extensibility and high compatibility, being suitable popularized networked mass storage system. The invented system is applied to networked mass storage system developed by Tsinghua Univ. own and passed test.

Description

technical field [0001] A method and system for a SAN dual-node mirroring cluster based on the FCP protocol belong to the technical field of network storage. Background technique [0002] With the increasing amount of network data, massive data storage has become an urgent problem to be solved in network development. Network storage devices provide information access and sharing services for information systems. It is a new secure storage structure and technology that is conducive to information integration and data sharing, and is easy to manage. With the deepening of network storage, the safe storage of data has been raised to an unprecedented height, and has become a major aspect of evaluating a system's high availability. Usually, methods to improve data availability include backup and mirroring. The more advanced methods in the field of mirroring include: a data replication method based on a two-node cluster (Cluster) and an asynchronous mirroring method based on a snap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/12H04B10/08H04Q3/52H04L12/26H04L29/08
Inventor 舒继武郑纬民姚骏严瑞
Owner TSINGHUA UNIV