An I/O Buffer Cache Architecture for Remote Direct Memory Access

该项目将研究一种低成本的缓冲缓存解决方案，用于提高远程直接内存访问（RDMA）上iSCSI终端系统的性能。在现代存储网络体系结构中使用RDMA协议可以减少CPU开销和由于终端系统的多次内存复制问题而导致的性能损失。基于iscsi的IP存储架构在RDMA上可以提供成本效益和高性能。在消除iSCSI协议和RDMA模型之间的差异以及减少由于内存利用率低下而造成的性能损失方面存在重大挑战。本研究通过开展以下活动来解决这些问题：1)通过减少跨iSCSI和RDMA边界的数据包转换数量，为客户端和服务器端RDMA协议套件上的iSCSI应用程序开发统一的缓冲缓存硬件/软件体系结构；2)开发传播更新协议来解决缓存RDMA读写失败问题。

An I/O Buffer Cache Architecture for Remote Direct Memory AccessAbstractThe project will investigate a low-cost buffer cache solution for improving performance of iSCSI end systems over Remote Direct Memory Access (RDMA). The use of RDMA protocols in modern storage networking architectures can reduce CPU overhead and performance loss due to the multiple memory-copy problem for end systems. An iSCSI-based IP storage architecture over RDMA can provide cost-effectiveness and high-performance.There are significant challenges in smoothing out the disparities between iSCSI protocol and RDMA model, and reducing performance loss due to inefficient memory utilization. This research addresses these problems by conducting the following activities: 1) developing a unified buffer cache hardware/software architecture for iSCSI applications over RDMA protocol suite on both client and server sides by reducing the number of data packet translations across iSCSI and RDMA boundaries; and 2) developing propagate update protocols to resolve cache RDMA read and write failure problems.