Re: systemd Unit - Modifying IPv4 parameters

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On Wed, May 8, 2013 at 9:33 AM, Tony Su <tonysu@xxxxxxxxxxxxxxxxx> wrote:
> In the "old days" edits were made directly to the appropriate file
> /proc/net/ipv4/...

Are you looking for /proc/sys/net/ip4?  AFAICT /proc/net hasn't
existed since everyone switched over to the 2.6 kernel (which happened
in Fedora Core 2 in 2004).

> With current systemd (running systemd v202), the entire IPv4 branch
> appears to have been replaced.

systemd's involvement with /proc begins and ends with mounting it.
The kernel defines its contents and they will be the same regardless
of which init system you use.

> Need guidance
> - How to configure/re-configure the TCP/IP Congestion Control algorithm
> - How to specify custom value for TCP/IP buffers, etc

This page seems to offer a good overview of the mechanisms for configuring this:
http://fasterdata.es.net/host-tuning/linux/

There's probably someone around here more versed in this, though.

-T.C.
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