Jiesheng Wu

Oversubscription is central to large-scale clouds: multiplexing virtual CPUs (vCPUs) over fewer physical CPUs (pCPUs) improves utilization and sales density, but meeting strict latency Service Level Objectives (SLOs) requires precise control over idle behavior. In 1:1 settings, idle-passthrough—e...

Secure containers such as Kata Containers strengthen isolation by running each container inside a lightweight VM. On today’s virtualized clouds, this creates an unavoidable form of nested virtualization with dominant cost in memory virtualization. Existing approaches entangle CPU virtualization a...

High-end virtual machines (VMs) have become essential in public clouds for supporting large-scale guest applications. While conventional pre-copy live migration cannot reliably migrate such high-end VMs due to convergence problems, post-copy migration offers a viable alternative. However, high-en...

Observability is crucial for diagnosing and troubleshooting cloud systems as they grow in scale and complexity. However, telemetry data are often stored and processed in siloed systems, leading to high latency, redundant data movement, and low operational efficiency. To address these challenges,...

Cloud local storage has been a popular service among many vendors thanks to its near-physical performance and affordable price. In this paper, we revisit the evolution of the cloud local storage at Alibaba Cloud. We systematically analyze and evaluate the motivations, architectures and pros/cons...

Efficient cloud computing relies on high-performance Elastic Block Storage (EBS) services, where virtual disk (VD) image loading significantly affects user experience. While the commonly used "lazy loading" approach reduces cold-start time from minutes to sub-seconds, our trace analysis of around...