scylladb/seastar

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

9342 stars · 1704 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Seastar is an open-source C++ framework for building high-performance, non-blocking, asynchronous server-side applications. It uses a shared-nothing, shard-per-core architecture with futures/promises, message passing between cores, and optional DPDK user-space networking.

Use cases

• write a high-performance async HTTP server in C++
• build a low-latency network service that scales across all CPU cores
• use DPDK user-space networking for a fast server application
• avoid locks by sharing state via message passing between cores
• build a database or cache server like Scylla or Memcached replacement

When to choose

• you need maximum server performance on modern multi-core Linux hardware
• you are comfortable with C++ and futures/continuation-style async code
• you want a shared-nothing design without locks or threads sharing state

When to avoid

• you need a quick general-purpose web app with rich ecosystem support
• your team is not experienced with C++ and low-level async programming
• you need portability beyond Linux/OSv or heavy third-party library integration

Facets

framework · maturity stable

web-framework http-server concurrency networking rpc backend web-development developer-tools performance microservices cpp cross-platform shared-nothing futures-and-promises dpdk shard-per-core async event-driven server-side linux

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