HECURA: The Server-Push I/O Architecture for High End Computing

与按请求存储和检索数据的传统I/O设计不同，高端计算(HEC)的新I/O体系结构基于一种新颖的“服务器-推送”模型，其中数据访问服务器主动将数据从文件服务器推送到计算节点的内存。这项研究的目标有两个：1)增加对数据访问延迟的基本了解，2)产生一种最大限度地减少I/O延迟的有效I/O体系结构。PIS计划通过研究数据访问模式识别、预取算法、数据替换策略和广泛的实验测试来增加基本理解。PI将使用PVFS2文件系统中的模拟和实际实施相结合的方式，验证其针对各种关键I/O密集型应用程序的文件服务器设计的性能改进。

Unlike traditional I/O designs where data is stored and retrieved by request, a new I/O architecture for High End Computing (HEC) based on a novel "Server-Push" model where a data access server proactively pushes data from a file server to the compute node's memory. The objective of this research is two fold: 1) increasing fundamental understanding of data access delay,2) producing an effective I/O architecture that minimizes I/O latency. The PIs plan to increase the fundamental understanding through the study of data access pattern identification, prefetching algorithms, data replacement strategy, and extensive experimental testing. The PIs will verify the performance improvement with their file server design for various critical I/O intensive applications by using a combination of simulation and actual implementation in the PVFS2 file system.