UCX Overview

This document describes how to perform container-based deployment of a Ceph cluster on a Kunpeng server running openEuler 20.03. It also describes how to configure and optimize the integration of the Storage Performance Development Kit (SPDK), Unified Communication X (UCX), and Kunpeng Storage Acceleration Library (KSAL) to maximize storage and network performance.

As distributed storage systems have increasing requirements for low latency and high performance, improving the performance of Ceph clusters has become an important issue. I/O latency in Ceph distributed storage mainly occurs during network transmission, data processing and distribution, data flushing, and metadata flushing. In the network transmission phase, UCX can be used to enable a remote direct memory access (RDMA) network and thus shorten network transmission latency, and the optimized memcpy algorithm in KSAL can be used to reduce data copy latency. In data and metadata flushing phases, high-performance storage interfaces of SPDK can be used to reduce I/O latency when writing data to drives.

After integrating SPDK, UCX, and KSAL, a Ceph cluster can achieve more efficient SSD access and network communication. Enabling these technologies will significantly improve performance in scenarios where a large number of concurrent requests need to be processed with a low latency.