os206 - slow data transfers

James Cameron quozl at laptop.org
Wed Jul 21 20:13:01 EDT 2010

On Wed, Jul 21, 2010 at 02:26:25PM -0500, Mikus Grinbergs wrote:
> I question whether "measurements" can be easily reproduced.  And when
> I do not know how these measurements will clarify the situation, I
> can't help but to think of "make work".

I agree, I don't think download.laptop.org onto USB stick ext3
filesystem measurements can be easily reproduced.  There are too many
variables outside your control.  The internet throughput can change
quickly.  A USB stick flash controller can pause for block erase.

Use of iperf on a local network can be easily reproduced, however.

I'm not asking you do to it, but the way you use iperf is:

1.  install iperf package on two hosts, (or install it on one and copy
the binary across),

2.  on one host, run "iperf -s",

3.  on the other run "iperf -c ${IP}" where ${IP} is the IP address of
the other host, and experiment with the other flags that are available.

James Cameron

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