Nuclei is a proactor-based IO system which is runtime agnostic and can work with any runtime. The proactor system's design principles are matching Boost Asio. Nuclei is not using a conventional reactor approach. It is completely asynchronous, and it's wrapping poll based IO in a proactive fashion.
Nuclei uses io_uring on Linux as the primary IO backend, secondarily you can use epoll. On MacOS, Nuclei is using kqueue. On Windows, the IOCP backend will be used.
The current io_uring implementation needs a modern Linux kernel (5.19+).
Features
- Most of the recent IO_URING features are available, ZC and other 6.1+ features are in TODO.
- Async TCP, UDP, Unix domain sockets and files...
- The proactor system doesn't block
- Scatter/Gather operations
- Minimal allocation
- More expressive than any other runtime
- Completely asynchronous I/O system with lock free programming
Examples
Please head to examples directory to run the examples:
$ cd examples
$ cargo run --example fread-vect
Tests
$ cargo test --no-default-features --features=iouring # For iouring
$ cargo test # For others
Configurations
Evented IO backend
When the iouring feature gate is not enabled, the platforms evented backend is used. For example, on Linux, epoll would be used.
Executor
Executor is using async-global-executor. Available features are:
async-exec: Usesasync-iofeature ofasync-global-executor.tokio
License
Credits
Gif is from the documentary called "Particle Fever".