about the improvment of network performance

Matthew Hawkins matthew at topic.com.au
Fri Jan 18 16:05:42 EST 2002

On Fri, 18 Jan 2002, Alex Satrapa wrote:
> First, you'll need to describe your system a little better.  You won't 
> get any better than 34kbps over a dialup modem link on a 33.6kbps modem, 
> for example.

That's not quite true.  It depends what you're talking about.  At any
given time the data transfer cannot exceed the bandwidth limitation.
However, if you're transferring mainly text (for example) you can load
in zlib compression into pppd, and get a throughput of perhaps double
the theoretical maximum (due to reconstructing the original from a
smaller, compressed part)

The real problem needs to be described a lot better.  Maybe the system
is underpowered cpu-wise, has a lot of ipchains rules, and throughput is
becoming cpu-bound.  Maybe the mss is set to 41 and all the tcp packets
are transferring 1 byte.  Maybe the remote end is really slow.  Who knows?


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