From 5b2b4473bd46dc412b11d1372704a2d4ef7d0465 Mon Sep 17 00:00:00 2001 From: Chris Koeritz Date: Thu, 2 Feb 2017 14:37:23 -0500 Subject: [PATCH] sets tcpip buffer sizes --- examples/os_related/set_tcp_config.sh | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 examples/os_related/set_tcp_config.sh diff --git a/examples/os_related/set_tcp_config.sh b/examples/os_related/set_tcp_config.sh new file mode 100644 index 00000000..7fc3d76e --- /dev/null +++ b/examples/os_related/set_tcp_config.sh @@ -0,0 +1,24 @@ +#!/bin/bash + +# this script modifies the linux kernel for maximum tcp buffer size, which can +# improve long-haul transfers over a wan. + +# new maximum buffer size to set. +new_max=4194304 + +echo "net.core.wmem_max=$new_max" >> /etc/sysctl.conf +echo "net.core.rmem_max=$new_max" >> /etc/sysctl.conf + +echo "net.ipv4.tcp_rmem= 10240 87380 $new_max" >> /etc/sysctl.conf +echo "net.ipv4.tcp_wmem= 10240 87380 $new_max" >> /etc/sysctl.conf + +echo "net.ipv4.tcp_window_scaling = 1" >> /etc/sysctl.conf + +echo "net.ipv4.tcp_timestamps = 1" >> /etc/sysctl.conf + +echo "net.ipv4.tcp_sack = 1" >> /etc/sysctl.conf + +echo "net.ipv4.tcp_no_metrics_save = 1" >> /etc/sysctl.conf + +echo "net.core.netdev_max_backlog = 5000" >> /etc/sysctl.conf + -- 2.34.1