Characterizing the performance of intel optane persistent memory

Structured storage for ubiquitous operating systems

“…随着 Intel Optane DC 持久内存的发布, 第 1 款非易失性内存开始商用, 图 8 展示它的内部体系结 构, 理解它的性能特征对于构建高效的持久应用程序非常重要. 近几年来, 涌现了许多关于 PM 性能 细致而深入的研究测试工作 [15,22] . 总的来说, 因其表现出复杂的行为, 性能受到访问模式、访问粒度、 设备内缓存和预取机制、非一致性存储器访问架构 (non uniform memory access architecture, NUMA) 等诸多因素的影响, 不应该简单地将 PM 视为较慢的、持久的 DRAM.…”

“…Flatstore [24] 是一个基 于 PM 的采用日志结构的高效键值存储引擎, 采用压缩日志技术将多条小日志条目打包到 256 字节的 批次中进行处理. 文献 [22] 详细分析了 PM 内部的读写缓冲的设计, 以及它与 CPU 缓存、DDR-T 协 议的交互. Nap [25] 将并发 PM 索引转换为支持 NUMA 的对应索引.…”

Energy Consumption Evaluation of Optane DC Persistent Memory for Indexing Data Structures

“…• Empirical evaluation of the Optane DCPM performance through microbenchmarks and/or applications and investigation of challenges and limitations [5], [7], [1], [9], [12], [10], [22], [20], [21] • New applications and data structures optimized for the Optane DCPM as persistent storage (mainly novel treebased data structures) [23], [24] • Novel workload schedulers, data placement algorithms and other runtimes for the Optane DCPM [25], [8], [26] The present work is mostly related to first category, as it aims to thoroughly evaluate Optane DCPM using indexing data structures. However, in contrast to the existing works, it focuses on the energy consumption aspects.…”

“…Additionally, the data persistence features of the NVM technologies can be used to provide fault tolerance support to applications. On the other hand, the Optane DCPM provides, in general, higher access latency and lower bandwidth compared to DRAM [5], [7], [8]. However, recent studies indicate that the performance of the Optane DCPM depends a lot on the workload access pattern and size [8].…”

“…On the other hand, the Optane DCPM provides, in general, higher access latency and lower bandwidth compared to DRAM [5], [7], [8]. However, recent studies indicate that the performance of the Optane DCPM depends a lot on the workload access pattern and size [8].…”