TechPrufer
Sign inGet started

Blogs›ScyllaDB›Asymmetric io_uring Backend for Seastar

Asymmetric io_uring Backend for Seastar

Asymmetric io_uring Backend for Seastar

1
posts
2026

This post introduces an asymmetric io_uring backend for Seastar, designed to offload I/O operations from application cores to dedicated I/O cores. This aims to reduce contention on application cores, minimize context switching overhead, and mitigate cache pollution by separating computation and I/O handling. The new backend contrasts with the existing symmetric io_uring and linux-aio backends, focusing on improving performance and latency predictability for compute-heavy workloads.

2026

Offloading I/O to Dedicated Cores: An Asymmetric io_uring Backend for Seastar and ScyllaDB

7/22/2026

Introduced an asymmetric io_uring backend for Seastar. This backend dedicates specific cores to handle I/O operations, allowing application cores to focus solely on computation. It aims to reduce context switching, cache pollution, and latency variance by separating I/O processing from application logic, offering an alternative to the symmetric io_uring and linux-aio backends.