Supporting Cloud Computing with the Virtual Block Store System
文介绍了虚拟块存储系统VBS，一个基于LVM, iSCSI和Xen管理程序的独立的块存储系统。它可以提供诸如创造卷和附件基本块存储服务的功能。其概念和功能都基于亚马逊弹性块存储模块（EBS）之上，可用于现有的容量服务器和Xen独立节点，并且可以很容易的扩展以支持其它的虚拟机管理和云计算系统。
Abstract
The fast development of cloud computing systems stimulate the needs for a standalone block storage system, which can provide persistent block storage services to the virtual machines maintained by the clouds. This paper presents the Virtual Block Store (VBS) System, a standalone block storage system built on the basis of LVM, iSCSI, and Xen hypervisor, which can provide basic block storage services such as volume creation and attachment. The concept and functional interface of VBS are based on the Amazon Elastic Block Store (EBS) service moreover, VBS can be used independently with an existing volume server and Xen nodes, and can be easily extended to support other virtual machine managers, or integrated with various cloud computing systems. Preliminary experiments show that a VBS volume can provide I/O performance that is similar to an ATA over Ethernet virtual device, and comparable to a local logical volume.
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