基于DWDM的SAN异地灾备系统研究  

Research on SAN Remote Disaster Recovery System Based on DWDM

作　　者：李洋[1] 田彬[1] 高新中[1] 

机构地区：[1]山西省电力公司信息通信分公司,山西太原030001

出　　处：《电力系统通信》2012年第12期61-64,共4页Telecommunications for Electric Power System

摘　　要：存储局域网络(SAN)搭载DWDM网络进行异地灾备时,会产生数据传输速度慢的问题。通过分析SAN的数据传输协议,发现传输速度慢是由于传输距离过长产生了传输时延,造成缓冲信用匮乏,进而限制了网络最大可用带宽,影响了传送速度。为了解决该问题,给出一种基于缓冲信用控制的方法,通过该方法能够保证缓冲信用的传送与数据流量的控制,可以将SAN直接连接到DWDM网络上进行数据备份,从而实现远距离数据传输与异地灾备。SAN link over DWDM network may appear problem that the speed of data transmission is slow during remote data backup. Through analyzing the transfer protocol of SAN, it found that the problem is due to many reasons, such as the long distance transmission generates transmission latency, causes buffer credit starvation. Then it limits the maximum amount of sustainable bandwidth and influences transfer speed. To solve this problem, this paper gives a method based on buffer credit control. This method can guarantee the transmission of buffer credit and data flow control, SAN can be link over DWDM network directly to implement long distance data transfer and remote disaster recovery.

关 键 词：存储局域网络 FC协议 密集波分复用 异地灾备 

分 类 号：TP309.3[自动化与计算机技术—计算机系统结构]