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Highload docs correction

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z3APA3A 2019-01-11 19:11:31 +03:00
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@ -28,9 +28,10 @@ Each connected client require:
<ul>
<li>1*thread (process)
<li>2*socket (file descriptor). For FTP 4 sockets are required.
<br>Under linux since 0.9 splice() is used. It much more effective, but requires
<br>Under linux since 0.9 splice() is used. It's much more effective, but requires
<br>2*socket (file descriptor) + 2*pipe (file descriptors) = 4 file descriptors.
<br>For FTP 4 sockets and 2 pipes are required with splice().
<br>Up to 128K (up to 256K in the case of splice()) of kernel buffers memory. This is theoretical maximum, actual numbers depend on connection quality and traffic amount.
<br>1 additional socket (file descriptor) during name resolution for non-cached names
<br>1 additional socket during authentication or logging for RADIUS authentication or logging.
<li>1*ephemeral port (3*ephemeral ports for FTP connection).
@ -60,6 +61,16 @@ socket and -os for proxy-to-server socket. Example:
proxy -olSO_REUSEADDR,SO_REUSEPORT -ocTCP_TIMESTAMPS,TCP_NODELAY -osTCP_NODELAY
</pre>
available options are system dependant.
<h5>Using 3proxy in virtual environment</h5>
If 3proxy is used in VPS environment, there can be additional limitations.
For example, kernel resources / system CPU usage can be limited in a different way, and this can become a bottleneck.
Since 0.9 devel, 3proxy uses splice() by default on Linux, splice() prevents network traffic from being copied from
kernel space to 3proxy process and generally increases throughput, epecially in the case of high volume traffic. But
since some work is moved to kernel, it requires up to 2 times more system resources in terms of CPU and memory.
Use -s0 option to disable splice() usage for given service, if system resources are additionally limited, e.g.
<pre>
socks -s0
</pre>
<h4>Extending ephemeral port range</h4>
Check ephemeral port range for your system and extend it to the number of the
ports required.