DC:Small: ProActive: A RAID Protection Activator for High Availability

部分或完全磁盘故障在现代大型数据中心中变得如此普遍和频繁，以至于它们现在被认为是常态而不是例外。因此，开发新的方法来有效地和显著地补充和改进现有的RAID保护机制是至关重要的，其目标是为RAID结构的存储系统提供高可靠性和可用性，使得它们能够容忍部分、完整和多个磁盘故障，同时向用户提供可接受的、不间断的服务。称为RAID保护激活器（ProActive），以解决RAID结构化存储系统面临的基本且不断增加的可用性挑战。ProActive利用应用程序工作负载强度和数据/奇偶校验管理，并智能地利用大型数据中心中丰富的可用备用存储资源，以解决RAID现有最先进可用性机制的效率问题。ProActive将开发解决方案，以处理RAID结构存储系统中日益频繁的部分和完整磁盘故障，其设计目标是显著补充和改进现有的故障检测、容错和故障恢复机制。该项目的更广泛影响在于：（1）影响和丰富高性能计算等领域的研究开发，这三个方面包括：（1）提高高端计算系统的可用性和可靠性;（2）基础设施开发，增强UNL的研究和教育，并通过公共领域的可访问性，提高高性能和数据密集型计算社区;以及（3）教育发展，使研究生和本科生接触高可用存储系统的前沿研究。

Partial or complete disk failures are becoming so common and frequent in modern-day large-scale data centers that they are now considered the norm rather than the exception. It is thus of paramount importance to develop novel approaches to effectively and significantly supplementing and improving the existing RAID protection mechanisms, with the goal of providing high reliability and availability for RAID-structured storage systems so that they are capable of tolerating partial, complete, and multiple disk faults while delivering acceptable, non-stop services to the users.This project seeks to develop a holistic framework, called a RAID protection activator (ProActive), to address the fundamental and ever-increasing availability challenge facing RAID-structured storage systems. ProActive exploits application workload intensity and data/parity management and intelligently leverages rich available spare storage resources in large-scale data centers to address the efficiency problem of the existing state-of-the-art availability mechanisms for RAID. ProActive will develop solutions to handle the increasingly more frequent partial and complete disk failures in RAID-structured storage systems based on the design goals of significantly supplementing and improving existing fault-detection, fault-tolerance, and fault-recovery mechanisms.The broader impact of the project lies in its (1) research development that impacts and enriches fields as diverse as high-performance computing, availability and reliability in high-end computing systems; (2) infrastructure development that enhances research and education at UNL and, through accessibility via public domain, the high performance and data-intensive computing community; and (3) educational development that exposes graduate and undergraduate students to cutting edge research in highly available storage systems.