一种新结构的DM-multipath与动态负载平衡  

New structure DM-multipath and dynamic load balancing

作　　者：阚闯[1] 戚玮玮[1] 

机构地区：[1]中国海洋大学信息科学与工程学院,山东青岛266100

出　　处：《计算机应用》2008年第2期289-291,共3页journal of Computer Applications

摘　　要：对于存储设备,Linux在多路径I/O方面主要有两种类型的解决方案:位于I/O调度器之上的顶层方案(BIO映射器)和位于底层的子系统具体方案(如IDE,SCSI)。因为实施它们的所在存储堆栈中的位置不同,每种方案各有优势。通过与第一种方案比较,介绍具体硬件子系统之上的另一种解决方案,新结构中重点实现移动内核当前多路径层——多路径设备映射器(dm-multipath)到I/O调度层之下,这种方案能够有效地支持动态的负载平衡。For storage devices, Linux mainly has two types of solution for muhipath I/O： high-level approaches that live above the I/O scheduler, and low-level subsystem specific approaches. Each type has its advantage because of the position in the storage stack in which it has been implemented. Tthe new structure focuses on a solution that attempts to reap the benefits of each type of solution by moving the kernel＇s current muhipath layer dm-muhipath, below the I/O scheduler and above the hardware-specific subsystem, and it can also support dynamic load balance.

关 键 词：多路径设备映射器 块设备 BIO 请求结构 

分 类 号：TP316.81[自动化与计算机技术—计算机软件与理论]