The true beauty of Mac OS X is Darwin, the BSD-based UNIX that runs under the hood of every Mac OS X computer. Having UNIX handy is what attracted me to OS X, and I know plenty of other administrator-types that have followed suit. Every UNIX variant has commands that …
As we have throughout the TCP Performance Tuning series, we're going to make sure RFC 1323 Window Scaling is enabled and increase our send and receive window size to 1 MB. The
nddcommand is the Solaris equivalent of
sysctlin FreeBSD/Linux/Mac OS X. As always, the '
$' represents …
Because Darwin is BSD-based, it's no surprise that Mac OS X TCP Performance Tuning is very similar to FreeBSD TCP Performance Tuning. It is no longer necessary to enable RFC 1323 TCP Extensions (in fact, the option to do so is gone). Also, we'll set the TCP send and receive …
If you have been following our TCP Performance Tuning series, you'll know that we want to enable RFC 1323 Window Scaling and increase the TCP window size to 1 MB. To do this, we'll add the following lines to
sudo sysctl -pto apply the …
In TCP window scaling and broken routers posted in July of 2004, LWN.net's corbet points out that certain routers are setting the RFC 1323 window scale to 0. This effectively sets the TCP window size for the transmission to the minimum value and greatly inhibits performance. As corbet notes …
To enable RFC 1323 Window Scaling and increase the TCP window size to 1 MB on FreeBSD, add the following lines to
You can make these …
The original TCP specification included a window size no larger than 64 KB. This limitation was introduced by the 16 bit header that specified window size. To achieve the recommended 1 MB window size, RFC 1323 TCP extensions must be enabled. The rest of this post is a somewhat detailed …
Trying to debug an
<acronym title="Asterisk Gateway Interface">AGI
</acronym>in Asterisk can be a frustrating experience. The main problem is that
STDERRonly outputs to the terminal Asterisk was started from. In most cases, this means the terminal is the server console. If your Asterisk server is sitting …
Note: Although this is a continuation of the TCP Performance Tuning article series, it's also valuable as a standalone reference.
This is a list of 14 congestion control algorithms available in TCP. I'm presenting it in alphabetical order.
- BIC TCP - Binary Increase Congestion Control, this is the default congestion control …
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