Ayder – HTTP-native durable event log written in C (curl as client)
Hi HN, I built Ayder — a single-binary, HTTP-native durable event log written in C. The wedge is simple: curl is the client (no JVM, no ZooKeeper, no thick client libs). There’s a 2-minute demo that starts with an unclean SIGKILL, then restarts and verifies offsets + data are still there. Numbers (3-node Raft, real network, sync-majority writes, 64B payload): ~50K msg/s sustained (wrk2 @ 50K req/s), client P99 ~3.46ms. Crash recovery after SIGKILL is ~40–50s with ~8M offsets. Repo link has the video, benchmarks, and quick start. I’m looking for a few early design partners (any…
In plain words
Ayder is a durable event log written in C that uses HTTP and curl as its client interface, eliminating the need for a JVM, ZooKeeper, or thick client libraries. It runs as a single binary and uses Raft for distributed consensus across nodes. The system achieves approximately 50,000 messages per second with a P99 client latency of 3.46 milliseconds and recovers from crashes in 40-50 seconds. It is designed for teams building event ingestion and streaming workloads who want a lightweight, simple alternative to traditional message brokers.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hi HN, I built Ayder — a single-binary, HTTP-native durable event log written in C. The wedge is simple: curl is the client (no JVM, no ZooKeeper, no thick client libs). There’s a 2-minute demo that starts with an unclean SIGKILL, then restarts and verifies offsets + data are still there. Numbers (3-node Raft, real network, sync-majority writes, 64B payload): ~50K msg/s sustained (wrk2 @ 50K req/s), client P99 ~3.46ms. Crash recovery after SIGKILL is ~40–50s with ~8M offsets. Repo link has the video, benchmarks, and quick start. I’m looking for a few early design partners (any event ingestion/streaming workload).
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