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I've always assumed that Nagle's algorithm affected the socket in both directions, and that setting TCP_NODELAY somehow informed the remote end also to switch off Nagle.

Is that right, or does setting TCP_NODELAY only affect the behaviour of the end that calls it?

Roddy
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1 Answers1

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TCP_NODELAY affect sending TCP segments only on the host that sets this option on its socket. That is, the peer's sending algorithm is not affected.

Maxim Egorushkin
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