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SubjectRe: Status of AIO
Ulrich Drepper wrote:
> What has network I/O to do with O_DIRECT? I'm talking about async network I/O.

O_DIRECT allows for zero copy IO, which saves a boatload of cpu cycles.
For disk IO it is possible to use O_DIRECT without aio, but there is
generally a loss of efficiency doing so. For network IO, O_DIRECT is
not even possible without aio.

By using aio and O_DIRECT for network IO, you can achieve massive
performance and scalability gains.

You said before that the kernel aio interface is not suitable for
sockets. Why not?


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