rio
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rio
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Production grade databases in Rust
Also, not to be too bad about a reputation fallacy, but I found the author to be flippant and disrespectful when good-faith unsoundness was pointed out in his crates: https://github.com/spacejam/rio/issues/30
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Linear Types One-Pager
In my previous post on linear types I spent quite a bit of time motivating linear types. For example the ergonomic rio io_uring library could be made sound if it could guarantee destructors are run. Or performing FFI with async C++ could be made more efficient if it could rely directly on destructors rather than having to involve an intermediate runtime for each call.
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The Stigma Around Unsafe
It's like cargo should have a way to mark a dependency as unsafe. That way, you could have a safe mmap crate as an unsafe dependency. Or something like rio which is deliberately unsound (but is fine if you abide by its rules through the entirety of the program)
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Anyone using io_uring?
for completeness there is also rio, but:
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Comparing the Rust uring libraries (tokio-uring, glommio, rio, ringbahn)
rio still has known soundness issues– its Completion futures block the thread when dropped (!!!), and can allow for use-after-free bugs if leaked. See https://github.com/spacejam/rio/issues/30 for details.
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kbio - Another Async IO Framework based on io_uring
Here are some posts about the design. https://without.boats/blog/io-uring/ https://github.com/spacejam/rio/issues/30 https://github.com/axboe/liburing/issues/109
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Tokio, the async runtime for Rust, hits 1.0
The author of sled[1], an embedded database in Rust which has a number of promising features, has also written parts of rio[2], an underlying pure Rust io_uring library, which is intended to become the core write path for sled. rio has support for files but also has a demo for TCP (on Linux 5.5 and later) and O_DIRECT.
I tested rio recently as I had a Brilliant but Bad Idea™ involving file access and was pleasantly surprised by the API, as I have been with sled's.
I'm excited for the experimentation in the Rust ecosystem and for such low level crates to handle the complex io_uring tasks (relatively) safely!
[1]: https://github.com/spacejam/sled
[2]: https://github.com/spacejam/rio
liburing
- Liburing 2.6 Released
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Io Uring
I've tinkered around with io_uring on and off for the last couple years. But I think it's really becoming quite cool (not that it wasn't cool before... :)). This was a really interesting post on what's new https://github.com/axboe/liburing/wiki/io_uring-and-networki.... The combination of ring-mapped buffers and multi-shot operations has some really interesting applications for high-performance networking. Hoping over the next year or two we can start to see really bleeding edge networking perf without having to resort to using DPDK :)
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Why you should use io_uring for network I/O
Thought I was doing something wrong at first, but after looking at examples and code, I just wasn't able to reach the epoll numbers. Looking on the Github page, there a few issues there with people who found the same thing, with their own examples. #1, #2
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Use io_uring for network I/O
To address my own silly questions, yes, one should use the new fixed buffers described in this document: https://github.com/axboe/liburing/wiki/io_uring-and-networki...
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The fastest rm command and one of the fastest cp commands
We're working on this! https://github.com/axboe/liburing/issues/830
- axboe / liburing
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io_uring and networking in 2023
Link: https://github.com/axboe/liburing/wiki/io_uring-and-networking-in-2023
What are some alternatives?
io_uring-echo-server - io_uring echo server
tokio-uring - An io_uring backed runtime for Rust
smol - A small and fast async runtime for Rust
libevent - Event notification library
KuiBaDB - Another OLAP database
libuv - Cross-platform asynchronous I/O
cachegrand - cachegrand - a modern data ingestion, processing and serving platform built for today's hardware
fio - Flexible I/O Tester
linux-aio - How to use the Linux AIO feature
kbio - Another Async IO Framework based on io_uring
go - The Go programming language