Collaborative Research. Conquest-2: Improving Energy Efficiency and Performance Through a Disk/RAM Hybrid File System

国家科学基金会分布式系统研究CESE/CNSABSTRACTPROPOSAL编号：0410908/0410896 PRINCIPAL调查员：Reiher Peter/Wang An-Instation：加州大学洛杉矶分校和佛罗里达州立大学PROPOSAL标题：协作研究：征服-2：通过磁盘/内存混合文件系统提高能效和性能这个项目提高了许多类型计算机的能效和性能。笔记本电脑电池耗尽时必须关机。虽然大型服务器不依赖电池，但它们的能源消耗在总成本中占很大比例。磁盘驱动器为这两种类型的机器带来了巨大的能源成本，消耗了某些服务器所使用的全部能源的77%。Conquest-2文件系统通过用廉价的RAM替换磁盘来持久存储许多文件，从而降低了能耗。早期的Conquest文件系统通过这项技术展示了令人印象深刻的速度改进。Conquest-2构建在Conquest的基础上，还可以降低磁盘功耗。Conquest-2是作为工作原型建造的，以证明它可以降低个人笔记本电脑和大型数据中心的能源需求，同时实现比传统系统更好的速度。以前保存在磁盘上的文件存储在永久RAM中，通过使磁盘保持较低的旋转速度来节省能源。由于RAM本身耗电，征服2号的一个研究挑战是在不影响系统速度的情况下以一种节能的方式使用持久RAM。在流行的Web服务器负载下，Conquest-2预计将节省高达77%的服务器电源，并实现高达96%的文件系统速度提升，这将通过使用实际工作负载测量原型来演示。Con-Quest-2的源代码将在开放源码许可下提供。Conquest-2将支持多种不同的机器类型和应用，包括数据库、网络和其他在线服务器以及笔记本电脑。布雷特·D·弗莱施博士，项目主任，CEISE/CNS2004年5月26日

National Science FoundationDistributed Systems Research CISE/CNSABSTRACTPROPOSAL NUMBER: 0410908/0410896PRINCIPAL INVESTIGATOR: Reiher Peter/Wang An-IINSTITUTION: University of California, Los Angeles and Florida State UniversityPROPOSAL TITLE: Collaborative Research: Conquest-2: Improving Energy Effi-ciency and Performance Through a Disk/RAM Hybrid File SystemThis project improves energy efficiency and performance for many kinds of com-puters. Portables must be shut down when their battery is exhausted. While large servers do not rely on batteries, their energy consumption is a significant fraction of overall cost. Disk drives incur large energy costs for both types of machines, consuming up to 77% of all energy used by some servers. The Conquest-2 file system reduces energy consumption by replacing disks with inexpensive RAM for persistent storage of many files. The earlier Conquest filesystem demonstrated impressive speed improvements through this tech-nique. Conquest-2 builds on Conquest to reduce disk power consumption as well. Conquest-2 is being built as a working prototype to demonstrate that it can reduce the energy demands of both individual laptop machines and huge data centers, while achieving speeds better than traditional systems. Files that were previously kept on disk are stored in persistent RAM, saving energy by keeping the disk spinning much less. Since RAM itself consumes power, a re-search challenge for Conquest-2 is to use the persistent RAM in a power-efficient way without compromising the system's speed. Under popular Web server loads, Conquest-2 is expected to save up to 77% of power on servers and achieve up to a 96% increase in file system speed, to be demonstrated by measuring the prototype with realistic workloads. The source code of Con-quest-2 will be available under an open-source license. Conquest-2 will sup-port many different machine types and applications, including databases, web and other on-line servers, and laptops. Dr. Brett D. FleischProgram Director, CISE/CNSMay 26, 2004..