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Latency, TCP ACKs and upload needs
- Subject: Latency, TCP ACKs and upload needs
- From: swmike at swm.pp.se (Mikael Abrahamsson)
- Date: Wed, 20 Apr 2016 17:51:44 +0200 (CEST)
- In-reply-to: <[email protected]>
- References: <[email protected]>
On Tue, 19 Apr 2016, Jean-Francois Mezei wrote:
> Considering a single download TCP connection. I am aware that modern TCP
> stacks will rationalize ACKs and send 1 ACK for every x packets
> received, thus reducing upload bandwidth requirements. Is this basically
> widespread and assumed that everyone has that ?
Typically you'll see one ACK per 2 packets, so you need approximately 1:50
bytes up/down ratio for the ACKs.
It's possible to have middle boxes suppress some ACKs, please see thread
here:
https://www.ietf.org/mail-archive/web/aqm/current/msg01482.html
--
Mikael Abrahamsson email: swmike at swm.pp.se