摘要
研究Linux系统中多路径磁盘过滤驱动程序的设计和实现。驱动程序将物理磁盘的多路径封装为一个虚拟设备。虚拟设备的I/O请求转发到磁盘设备上执行,由路径选择算法将主机的负载均衡地分配到各路径上。当路径发生故障时由驱动程序将失败的I/O请求切换到其它路径,屏蔽了路径故障。驱动程序利用多路径改善了主机的I/O性能,提高了系统的可用性。
A multi-path disk filter driver for Linux is designed and implemented to represent the plurality of data paths to the I/O device as a single virtual device. The I/O requests for the virtual device are redirected to selected disk devices, and the I]O load is distributed among multiple paths by the path selection algorithm. If one path fails, the incomplete I/O requests are redirected to the survival paths so the path failure is isolated. The filter driver increases the data access throughput and availability by using multiple paths.
出处
《计算机工程》
CAS
CSCD
北大核心
2006年第9期230-232,共3页
Computer Engineering
基金
国家自然科学基金资助项目(60273073)
关键词
容错
高可用性
负载均衡
LINUX
Fault tolerance
High availability
Load balance
Linux
