Retransmission-erasure code transmission protocol-based remote mirroring method and system

Abstract

The invention discloses a retransmission-erasure code transmission protocol-based remote mirroring method and a retransmission-erasure code transmission protocol-based remote mirroring system. The system comprises a write request interception module, a network block equipment driving module, a compression and encryption module, a batch code transmitting module and a backup module. The method comprises that: a production center intercepts a write request; a calculation center compresses and encrypts backup data; the calculation center transmits the backup data by using a Hybrid automatic repeat request / forward error correction (ARQ / FEC) transmission protocol; and a backup center backs up the data and the like. Compression, encryption and calculation can be efficiently performed according to the hardware configuration of the calculation center by using thread level parallel technology. The invention provides the Hybrid ARQ / FEC transmission protocol, and performs instruction level parallel optimization on odd and even calibration array codes in an FEC mechanism. The invention also discloses a Hybrid ARQ / FEC transmission protocol-based remote mirroring system. The problem of low efficiency under a wide area network environment in the prior art is solved, particularly the load of the production center can be effectively relieved in the application of a multi-backup center, and the throughput of the remote mirroring system is improved.

Description

technical field [0001] The invention belongs to the technical field of remote mirroring, in particular to a remote mirroring method and a remote mirroring system. Background technique [0002] Today, data disaster recovery technology has become increasingly important. Especially the off-site remote mirroring technology, its natural advantages in the face of natural disasters such as fires, earthquakes, floods, etc. have attracted more and more attention from academia and industry. [0003] The remote mirroring technology is applied in the WAN environment, so many characteristics of the WAN determine its design features to a large extent: 1. RTT (Round Trip Time, round-trip time at both ends) cannot be ignored, usually within 100~500ms within range. 2. There is a possibility of packet loss. Research shows that most packet loss rates can fluctuate within 0%~1%. 3. The sending bandwidth is limited, usually in the range of 0.01~600Mbps. [0004] In order to save network band...

AI Technical Summary

Problems solved by technology

[0007] The object of the invention is to solve the problem of low efficiency of the prior art in the wide area network environment, and provide a remote mirroring method and a remote mirroring system based on the Hybrid ARQ / FEC transmission protocol , this method can handle load balancing very well, improve the throughput of the whole system, and can support applications with multiple backup centers at the same time

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