The author here: All examples in the guide are aimed at throwing light at the io_uring and liburing interfaces. They are not very useful or very real-worldish examples. The idea with this example in particular is to show the difference how readv/writev work synchronously vs how they would be "called" io_uring. May be I should call out the fact that these programs are more tuned towards explaining the io_uring interface a lot more in the text. Thanks for the feedback.