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Update MTU post

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Neil Alexander 2018-07-13 10:31:17 +01:00
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@ -66,10 +66,11 @@ substantial performance drop whilst the operating system throttles down that
inner TCP connection to cope with what it believes to be congestion. inner TCP connection to cope with what it believes to be congestion.
However, by using large MTUs, and therefore larger window sizes on the inner TCP However, by using large MTUs, and therefore larger window sizes on the inner TCP
connection, we send far less TCP control messages over the wire - as many as 43 connection, we send far less TCP control messages over the wire - possibly up to
times less - therefore there are far less control messages from the inner as many as 43 times less - therefore there are far less opportunities for
connection which may be affected or amplified by retransmission. This helps to control messages on the inner connection to be affected or amplified by
stabilise performance on the inner TCP connections. retransmission. This helps to stabilise performance on the inner TCP
connections.
There are also some other clever things taking place at the Yggdrasil TCP layer. There are also some other clever things taking place at the Yggdrasil TCP layer.
In particular, LIFO queues are used for session traffic, which results in In particular, LIFO queues are used for session traffic, which results in