Flexible NVMe Request Routing for Virtual Machines
Tu Dinh Ngoc, Boris Teabe, Georges Da Costa, Daniel Hagimont (IRIT, Université de Toulouse, CNRS, Toulouse INP, UT3)
Presentation at IPDPS 2024, Session 7B: Communication Subsystems
Abstract:
Recent advances in storage hardware have resulted in massive improvements in both I/O latency and throughput.
However, existing storage virtualization tools either depend on a heavy and inefficient I/O stack that is not optimized for parallelism, or require a separate API that is difficult to manage and monitor.
In this work, we introduce NVMetro, a solution based on the NVMe protocol that proposes a flexible choice between multiple I/O paths to ease the development of adaptive and performant virtual storage.
NVMetro provides two components: (1) an intelligent I/O classification and routing framework powered by eBPF; and (2) an easy-to-use and performant API to assist the creation of userspace I/O functions within our framework.
We demonstrate the benefits of NVMetro by implementing two virtual storage functions, and we evaluate them using various benchmarks. The obtained results show that NVMetro achieves a performance and scalability comparable to bleeding-edge, kernel-bypass technologies while retaining the flexibility of traditional OS-based storage APIs.
Contact:
dinhngoc.tu [at] irit.fr
boris.teabedjomgwe [at] enseeiht.fr
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