论文标题
RDMA与混合记忆系统上本地访问之间的干扰分析
Analysis of Interference between RDMA and Local Access on Hybrid Memory System
论文作者
论文摘要
我们可以使用由DRAM和Intel Optane DC持续内存组成的混合存储系统（本文中称其为DCPM）作为DCPM现在自2019年4月以来可在市售上找到。即使DCPM的延迟延迟比DRAM高几倍，但DCP的容量也比DRAM高几倍，而DCP的成本也比DCP的成本高几倍。另外，DCPM是非挥发性的。具有此混合内存系统的服务器可以改善内存数据库系统和虚拟机（VM）系统的性能，因为这些系统通常会消耗大量内存。此外，可以通过远程直接内存访问（RDMA）访问DCPM来实现高速共享存储系统。我认为某些DCPM通常被分配为其他远程服务器之间的共享区域，因为在具有混合存储器系统的服务器上执行的应用程序通常无法使用DCPM的整个容量。本文评估了远程服务器的本地内存访问与RDMA之间的干扰。结果，我表明对此混合存储系统的干扰与传统的只有DRAM的存储系统有显着不同。我还认为，当这种干扰发生时，需要进行某种限制实施。
We can use a hybrid memory system consisting of DRAM and Intel Optane DC Persistent Memory (We call it DCPM in this paper) as DCPM is now commercially available since April 2019. Even if the latency for DCPM is several times higher than that for DRAM, the capacity for DCPM is several times higher than that for DRAM and the cost of DCPM is also several times lower than that for DRAM. In addition, DCPM is non-volatile. A Server with this hybrid memory system could improve the performance for in-memory database systems and virtual machine (VM) systems because these systems often consume a large amount of memory. Moreover, a high-speed shared storage system can be implemented by accessing DCPM via remote direct memory access (RDMA). I assume that some of the DCPM is often assigned as a shared area among other remote servers because applications executed on a server with a hybrid memory system often cannot use the entire capacity of DCPM. This paper evaluates the interference between local memory access and RDMA from a remote server. As a result, I indicate that the interference on this hybrid memory system is significantly different from that on a conventional DRAM-only memory system. I also believe that some kind of throttling implementation is needed when this interference occures.
