存储区域网络中路径容错及负载均衡的研究  

Research on Fault Tolerant Paths and Load Balancing for Storage Area Networks

作　　者：谭毓安[1] 朱立谷[2] 曹元大[1] 

机构地区：[1]北京理工大学计算机科学与工程系,北京100081 [2]华中科技大学国家外存储系统专业实验室,武汉430074

出　　处：《计算机工程》2006年第12期32-33,41,共3页Computer Engineering

基　　金：国家自然科学基金资助项目(60273073)

摘　　要：为利用存储区域网络的冗余路径,在主机上加入驱动程序对逻辑单元(LUN)的输入/输出请求进行截获。在故障路径上的I/O请求失败后,由驱动程序在正常路径上重新执行。路径失败时I/O请求直接发送给HBA驱动程序,避免了磁盘驱动程序中的无效重试过程,缩短了故障切换时间。I/O请求被分配到多条路径上,提高了主机的吞吐能力,缩短了I/O平均响应时间。To utilize the redundant paths in storage area networks, a storage path driver （SPD） is proposed and implemented to hook I/O requests bound for the logical units. The SPD driver routes all failed I/O requests on the failed path through survival paths. The failover time is reduced by skipping the retry operations of the disk device driver. I/O requests of the logical units are distributed among all physical paths, the host load is balanced on these parallel paths to improve the I/O performance, including increasing the I/O throughput and shortening the average I/O response time.

关 键 词：存储区域网络 容错 高可用性 负载均衡 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]