Open Source Summit India 2026

S3 APIs power modern Linux infrastructure, yet most object storage traffic still relies on TCP/IP. Under high concurrency and large transfers, TCP becomes CPU-intensive and limits throughput. RDMA promises Accelerated I/O through kernel bypass and zero-copy data movement—but applying RDMA to S3 workloads is not the same as NFS or block storage.

This session explores how RDMA can accelerate S3-style object transfers in distributed storage systems. We examine memory registration strategies, connection scalability, and what changes when dealing with multipart uploads, HTTP range reads, and parallel clients.

Through real validation scenarios, we compare throughput, latency, and CPU usage across TCP and RDMA paths. We’ll also highlight where RDMA excels, and where it falls short, such as in small-object or metadata-heavy workloads.

Attendees will gain a practical framework for evaluating Accelerated I/O in their own Linux storage environments: what to measure, what to tune, and what performance gains to realistically expect.