io-uring

What exactly is io_uring?

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io_uring is a (new as of mid 2019) Linux kernel interface to efficiently allow you to send and receive data asynchronously. It was originally designed to target block devices and files but has since gained the ability to work with things like network sockets. Unlike something like epoll(), it is built around a completion model … Read more

Is there really no asynchronous block I/O on Linux?

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(2020) If you’re using a 5.1 or above Linux kernel you can use the io_uring interface for file-like I/O and obtain excellent asynchronous operation. Compared to the existing libaio/KAIO interface, io_uring has the following advantages: Retains asynchronous behaviour when doing buffered I/O (and not just when doing direct I/O) Easier to use (especially when using … Read more

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