CAREER: Building Virtual Devices with QoS Assurance in a Consolidated Storage Infrastructure

职业：在整合存储基础设施中构建具有 QoS 保证的虚拟设备

• 批准号: 0845711
• 负责人: Song Jiang
• 金额: $ 40万
• 依托单位: Wayne State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-02-15 至 2016-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0845711&HistoricalAwards=false
• 关键词: CAREER; Building; Virtual; Devices; QoS

A growing and inevitable trend in the use and management of storage resources is the consolidation of distributed storage into a large data center to reduce the rapidly growing administration cost and to improve resource utilization. Despite its compelling advantages and years of efforts on research and product development, a critical challenge in turning this promising technology into reality remains to be addressed, which is that the quality of the I/O services (QoS) cannot be conveniently presented and efficiently guaranteed for users who outsource their dedicated storages to the shared system. To this end, a performance interface, or specification of required service quality, must be able to allow a diverse set of users to easily relate each of their I/O QoS requirements to their respective application performance and enable efficient system implementation to meet the QoS requirements. Currently, the QoS requirements are usually presented in the form of service-level agreements (SLAs) to bound latency and throughput of I/O requests. SLA is not suitable for I/O requests from application servers to storage servers because users have difficulties in using the performance interface and resources allocation can be misguided by the SLA measures, which do not consistently reflect users' resource demands.To address this critical issue, the investigator will develop a reference (or virtual) storage device as performance interface and will implement consolidated storage service based on the interface. In this way, a user is guaranteed to receive an I/O service whose quality is at least as good as that on the reference system regardless of variations and instantaneous changes of data access patterns. The research project aims to remove the significant barrier for users and system administrators to communicate I/O performance requirements and pave the road to wide acceptance of the storage consolidation technology.

将分布式存储整合为一个大型数据中心，以降低快速增长的管理成本，提高资源利用率，是存储资源使用和管理日益增长的必然趋势。尽管它具有引人注目的优势，并且在研究和产品开发方面付出了多年的努力，但在将这项有前途的技术转化为现实方面仍然存在一个关键的挑战，即对于将专用存储外包给共享系统的用户来说，无法方便地呈现和有效地保证I/O服务（QoS）的质量。为此，性能接口或所需服务质量的规范必须能够允许不同的用户组轻松地将他们的每个I/O QoS要求与他们各自的应用程序性能联系起来，并使有效的系统实现能够满足QoS要求。目前，QoS需求通常以服务水平协议（sla）的形式表示，以绑定I/O请求的延迟和吞吐量。SLA不适用于从应用服务器到存储服务器的I/O请求，因为用户在使用性能接口时存在困难，并且SLA指标可能会误导资源分配，不能一致地反映用户的资源需求。为了解决这个关键问题，研究者将开发一个参考（或虚拟）存储设备作为性能接口，并将基于该接口实现统一的存储服务。这样，无论数据访问模式的变化和瞬时变化如何，用户都可以保证获得至少与参考系统相同质量的I/O服务。该研究项目旨在消除用户和系统管理员沟通I/O性能需求的重大障碍，并为存储整合技术的广泛接受铺平道路。