Building a high-performance, cost-effective cloud requires a deep understanding of the underlying storage infrastructure. The KVM virtualization stack offers a complex landscape of I/O technologies, from traditional iothread and aio modes to the newer, low-overhead io_uring. While these options promise different levels of performance and resource utilization, selecting the optimal configuration for a given workload can be a significant challenge for cloud builders and designers.
This presentation dives into a comprehensive benchmarking study designed to demystify these choices. Using industry-standard tools like FIO, pgbench, and rsync, Venko compares a range of KVM storage configurations across key metrics: latency, maximum IOPS, throughput, and CPU overhead. He provides a data-driven comparison of different I/O modes—including io_uring and its predecessors—and explores how specific configurations impact performance for diverse workloads.
Watch back the session to gain the practical knowledge needed to make informed design decisions for your cloud infrastructure. It equips you with the insights to understand the trade-offs, identify performance bottlenecks, and build a KVM stack that delivers the best results for your specific needs.
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The CloudStack Collaboration Conference 2025 took place in November 19-21 in Milan, Italy, bringing together CloudStack users, developers, and operators from 40+ countries. This annual, in-person event provided a unique opportunity for the global CloudStack community to connect, collaborate, and help shape the future of the open-source platform.
We would like to express our sincere gratitude to our sponsors for their support in making this event possible: ShapeBlue, US Signal, LINBIT, StorPool, CYSO Cloud, DIMSI, CDLAN, Your.Online, Ampere, Stack Console, Yotta, proIO and weSystems.
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Registration is now open for #CloudStackCollab 2026, taking place in Edinburgh, Scotland, on November 18 – 20. Register early and save €130 with the Super Early Bird ticket.
👉 https://cloudstack.short.gy/tzuewW
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