基于ALUA的多路径存储系统

随着网络存储技术的不断深入发展与广泛应用，存储多路径技术成为信息系统容灾与故障恢复方案中的核心技术之一.在现有存储多路径技术的基础上，提出了一种基于ALUA的多路径存储子系统总体框架，并重点在逻辑卷控制器属主管理、ALUA属性与路径选择策略配置和I/O重定向等模块进行了创新性的设计与实现.经过应用测试，该系统很好地解决了存储系统的路径故障迁移和故障恢复问题，并智能地实现了路径间I/O的负载均衡，极大地提高了性能和可靠性.

Multi-Path Storage System Based on ALUA

With the rapid development and wide application of SAN technology, multi-path technology becomes one of the key technologies to achieve disaster tolerance and high performance. Based on the existing techniques, an improved multi-path storage sub-system is presented. And then improvement is made in four modules, i.e., LUN ownership management, configuration of ALUA, path selection strategy, and I/O forwarding implementation. The test results show that this scheme can be a very good solution to the path failover and load balance problems, greatly enhancing the I/O performance.