How to determine scp Transfer Speed
T. 'Nifty New Hat' Mitchell
mitch48 at sbcglobal.net
Sun Jun 20 17:39:11 UTC 2004
On Mon, Jun 21, 2004 at 02:36:14AM +1000, Colin Charles wrote:
> On Tue, 2004-06-15 at 04:39, Ow Mun Heng wrote:
>
> > V simple question which someone google can't find. I can find using
> > google about ppl talking about comparing transfer speed using scp and
> > ftp and wget (over http) etc.. but for the life of me I do not have any
> > idea how to toggle scp such that it will display what the current
> > transfer speed it.
>
> scp uses encryption, so definitely does take a speed hit
>
> > All I get is
> >
> > File-transfer %sent |### 1111bytes ETA
>
> scp -r foo at bar.com:/myfiles .
>
> Will give me:
> file-being-transferred %sent size transfer_speed ETA
>
> Seems to work for me (I actually have such a job running now... :))
Works for me too. Rates for small files are often silly.
In addition to encryption it can support compression (protocol version 1 only).
scp -C -r foo at bar.com:/myfiles .
For compression you trade CPU cycles for bandwidth. Often on a local net
compression can slow things (depends on the data).
Inspect config files... o $HOME/.ssh/config and /etc/ssh/ssh_config with
/etc/ssh/sshd_config can alter behavior in ways you do not expect because
the flag was set there not on the command line.
-q Disables the progress meter.
-l limit Limits the used bandwidth, specified in Kbit/s.
If you are transferring a file in. Do not ignore the ability to
do arithmetic in a second window.
ls -l; sleep 60; ls -l
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