RE: [cobalt-users] XTR and FTP

[flash22@xxxxxxx]

On Sat, 21 Apr 2001, Cavan Kelly wrote:

> Timothy Bissell wrote:
> >
> > Am I missing something here? Those both look successful. Is it

He's referring to the time...

> > > ftp> get imp-2.2.4.tar.gz
> > > 360076 bytes received in 1.83e+03 secs (0.19 Kbytes/sec)
> > > ftp> put imp-2.2.4.tar.gz
> > > 360076 bytes sent in 3.82 secs (92 Kbytes/sec)

One thing that will cause behaviour like this is MTU mismatch going
through a gateway that can't handle packet fragmenting properly, NAT on
older linux kernels is known for this, as is the older pppoe module...

I'd also note that a 300k file is too small to really use as a test, it
all fits in memory, so you could be seeing disk issues mixed in...

I've also seen this kind of thing when using cheap hubs that think they
support full duplex but don't, massive packet collisions occur in one
direction....(at 1900bytes/sec i'de vote for this one)

There are also a number of tweaks to proftp to adjust how it buffers files
while reading/writing, may be worth fiddling with these, cobalt just uses
the defaults on most machines i have seen...(and the sendto issue)

gsh