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  1. Lustre
  2. LU-13801

Enable io_uring interface for Lustre client

Details

    • Improvement
    • Resolution: Done
    • Minor
    • None
    • None
    • None
    • 9223372036854775807

    Description

      Kernels since 5.1 have implemented the io_uring interface (https://kernel.dk/io_uring.pdf) for efficient asynchronous IO submission to storage. According to posted results, io_uring is on-par with SPDK doing all of the IO in userspace. The io_uring interface is intended to replace the older libaio interface.

      With the recent performance improvements for libaio AIO/DIO, it should be possible to use the io_uring interfaces in a similar manner.

      I don't think many applications are using this interface yet, but since it provides a significant improvement over libaio it will likely become used in performance-oriented applications.

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          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-13799 DIO/AIO efficiency improvements

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved
          is related to

          Improvement - An improvement or enhancement to an existing feature or task. LU-4198 Improve IO performance when using DIRECT IO using libaio

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

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              wc-triage WC Triage
              adilger Andreas Dilger
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