Awesome Seastar

A curated list of resources related to Seastar, an industrial-grade C++ framework for building high-performance servers.

News

• What's new in Seastar (infrequently released)
  • Issue 1 - Apr '23
  • Issue 2 - Dec '23
  • Issue 3 - Apr '24
  • Issue 4 - Sep '24

Building with Bazel

The official build system of Seastar is CMake. But now Seastar can now be brought into a Bazel project using this https://registry.bazel.build/modules/seastar. It's as easy as adding this to your MODULE.bazel:

bazel_dep(name = "seastar", version = "25.08.0-20250807194611-1520326e6032")

You'll still need to install several system dependencies, but this set should reduce over time. This is receipe was contributed by Redpanda which has now officially moved to a 100% Bazel build.

Projects

Systems and projects using Seastar

• Ceph - Distributed storage system for object, block, and file
  • The seastar-based storage engine is called Crimson
• CPV - Web framework written in C++ and Seastar
• Chogori - Low-latency distributed OLTP database
• Lightbits - Lightbits LightOS
• ministun - RFC 8489 STUN server
• mithril Client-server framework inspired by Netty
• Parquet4Seastar - Parquet file format implementation for use in Seastar projects
• Pedis/1store - Replacement for Redis written in Seastar
• RageDB - In Memory Property Graph Server using the Shared Nothing design from Seastar
• Redpanda - Replacement for Apache Kafka designed for modern hardware
• Scylladb - Replacement for Apache Cassandra and Amazon DynamoDB
• Shredder - Research prototype for SoCC '19 paper embedding v8 in Seastar
  • nanoservices - Some relationship to Shredder
• SMF - RPC framework built for microseconds latencies using Seastar
• SpiderDB - An on-disk key-value database based on a b-link tree

Learning

Resources for learning Seastar

• Official tutorial - a comprehensive tutorial from the creators of Seastar
• Seastar internals - is a series of deep dives into various Seastar components
• Asynchronous Programming with Seastar - is a series of tutorials covering Seastar compnents
• Rolling your own MOM - a series documenting the MOZA middleware
• Seabrute - a selfstudy project for learning seastar by implementing distributed password bruteforce

Archived

These appear to no longer exist :(

• seastar-kafka-client - A seastar-based kafka client

Contributors