A Novel Network RAID Architecture with Out-of-Band Virtualization and Redundant Management

Wenwu Na, Xiaoxuan Meng, Chengxiang Si, Jian Ke, Xudong Zhu, Qingzhong Bu, Lu Xu
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引用次数: 3

Abstract

The paper presents a novel network RAID storage system based on the out-of-band virtualization architecture and the backend centralized redundant management. The application servers can inquire the mapping information of virtual disk from the out-of-band virtualization server and directly access the storage nodes. The read request can fetch the data from special storage node, while the write request is not only stored into the storage node, and also mirrored into the redundant server by the storage node. The redundant server can cache updated data in local disks with log-structured mode, and calculate the parity of RAID5 in the background process when the system is idle. It relieves the bottle problem of I/O performance and low reliability danger of single controller in the front-end centralized management system. And the layout of RAID1/RAID5 on the data block has acquired the trade-off among performance, reliability and cost.
一种具有带外虚拟化和冗余管理的新型网络RAID架构
提出了一种基于带外虚拟化架构和后端集中冗余管理的新型网络RAID存储系统。应用服务器可以向带外虚拟化服务器查询虚拟磁盘的映射信息,并直接访问存储节点。读请求可以从特定的存储节点获取数据,而写请求不仅存储在存储节点中,而且由存储节点镜像到冗余服务器。冗余服务器可以将更新后的数据以日志结构的方式缓存到本地磁盘,并在系统空闲时在后台进程中计算RAID5的奇偶校验。缓解了前端集中管理系统中存在的I/O性能瓶颈问题和单控制器可靠性低的危险。RAID1/RAID5在数据块上的布局实现了性能、可靠性和成本的权衡。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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