Portrait of Chuanxiong Guo

Chuanxiong Guo

Principal Software Engineering Manager


I am a PRINCIPAL SOFTWARE ENG MANAGER at Microsoft Azure. I lead the Azure Network Performance team. In Azure, we build large-scale cloud systems to run one of the largest cloud computing infrastructure in the world. My team introduces cutting-edge networking technologies, e.g., Lossless TCP, RDMA/RoCEv2 (Remote Direct Memory Access, RDMA over Converged Ethernet) into Azure production networks at scale, defines and measures network service level agreement (SLA), designs and implements advanced network protocols and network quality of service (QoS), builds tools and services for network failure detection and troubleshooting. By introducing new technologies, building and hardening network tools and services, we provide a better network infrastructure for Microsoft Azure, which in turn provides improved cloud computing experiences for our first and third party customers.

My areas of interest include: networked systems design and implementation at scale, data center networking (DCN), network troubleshooting, network security, networking support for operating systems and applications, and cloud computing. I am interested in finding simple yet deep and elegant solutions to real-world networking and systems problems, with real-world impact.

Before I joined Microsoft Azure, I was a SENIOR RESEARCHER in the Wireless and Networking Group at Microsoft Research Asia, worked on Data Center Networking (DCN) research.


CloudBrain for Automatic Troubleshooting for the Cloud

Established: January 1, 2016

Service availability, which is arguably the single most import KPI for cloud computing, can be brought down by various incidents. The state-of-the-art of incident troubleshooting, however, is still an (exhausting) effort of human experts. Our ongoing project, CloudBrain, aims…

RDMA for Cloud Computing

Established: May 1, 2013

In this project, we have introduced a series of technologies, including DCQCN congestion control and DSCP-based PFC, and addressed a set of challenges including PFC deadlock, RDMA transport livelock, PFC pause frame storm, slow-receiver symptom, to make RDMA scalable and…













Professional Activities

I have served on the following technical program committees: