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Seastar is an advanced, open-source C++ framework for high-performance server applications on modern hardware. Seastar is used in Scylla, a high-performance NoSQL database compatible with Apache Cassandra. Applications using Seastar can run on Linux or OSv.
Get Started

Seastar is the first framework to bring together a set of extreme architectural innovations, including:

  • Shared-nothing design: Seastar uses a shared-nothing model that shards all requests onto individual cores.
  • High-performance networking: Seastar offers a choice of network stack, including conventional Linux networking for ease of development, DPDK for fast user-space networking on Linux, and native networking on OSv.
  • Futures and promises: An advanced new model for concurrent applications that offers C++ programmers both high performance and the ability to create comprehensible, testable high-quality code.
  • Message passing: A design for sharing information between CPU cores without time-consuming locking


Getting Started with Seastar

Source code is available from the Seastar repository on GitHub.

Seastar documentation is available on the web or within the source code.

seastar-dev is the project mailing list.

Follow @ScyllaDB on Twitter for more info.


Performance

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In the above examples, all servers are running on Linux. The stock Memcached is version 1.4.17.

Details on HTTP performance data are also available.