CSR: Small: Advancing Operating System Interfaces to Solid-State Storage

CSR：小：推进操作系统与固态存储的接口

• 批准号: 1218485
• 负责人: Michael Swift
• 金额: $ 48.71万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1218485&HistoricalAwards=false
• 关键词: CSR; Small; Advancing; Operating; System

Solid-state storage technologies, such as flash, phase-change memoryand memristors promise large-capacity storage at speeds much fasterthan disk. To date, mainstream use of these technologies has been as areplacement for disks, storing a disk-oriented file system. However,solid-state storage is and will remain far more expensive thandisks. Thus, it will often be used as a cache or special-purposestore, and not as the main repository of data.This proposal develops new interfaces to solid-state storage thatleverage its new features, such as access via ordinary memoryinstructions, and its role in large software systems as a middle layerbetween memory and disk. It focuses on two forms of solid-statestorage: flash memory, common in solid-state drives and mobiledevices, and forthcoming storage-class memory, which compared to flashpromises lower latency, better endurance, and access as memory ratherthan as a device.This research addresses important concerns about using solid-statestorage: how best to use the capabilities of these devices to improvespecific applications or use cases, such as caching; how to provideaccess to internal management capabilities of solid-state storagedevices, such as address translation and garbage collection, toapplications; how to remove software layers between an application andstorage to reduce latency; and how to provide reliable storage whileremoving many of the layers that currently provide reliability.

闪存、相变存储器和忆阻器等固态存储技术有望以比磁盘快得多的速度提供大容量存储。迄今为止，这些技术的主流用途是替代磁盘，存储面向磁盘的文件系统。 然而，固态存储现在和将来都比磁盘贵得多。因此，它通常被用作缓存或专用存储，而不是作为数据的主存储库。该提案开发了固态存储的新接口，利用其新功能，例如通过普通内存指令进行访问，及其在大型软件系统作为内存和磁盘之间的中间层。它重点关注两种形式的固态存储：闪存，常见于固态驱动器和移动设备，以及即将推出的存储级内存，与闪存相比，它具有更低的延迟、更好的耐用性，并且可以作为内存而不是设备进行访问。这项研究解决有关使用固态存储的重要问题：如何最好地利用这些设备的功能来改进特定的应用程序或用例，例如缓存；如何向应用程序提供对固态存储设备内部管理功能的访问，例如地址转换和垃圾收集；如何删除应用程序和存储之间的软件层以减少延迟；以及如何提供可靠的存储，同时删除当前提供可靠性的许多层。