poor scp speed on one server

[Doncho N. Gunchev]

On Tuesday 13 April 2004 16:39, Götz Reinicke wrote:
> Hi,
> 
> I have tried to copy some files to one server using scp and noticed a 
> poor speed. I can copy files with about 4 MB/sec :-(.
> 
> Copying the same files to other servers I get a speed about 8 MB/sec.
> 
> The NIC is a 3Com 905b fastethernet, the switch is a cisco catalyst 
> fastethernet.
> 
> Any ideas what can cause this difference?
> 
> A hdparm -Tt on the "slow" server showes:
> 
>   Timing buffer-cache reads:   512 MB in  2.00 seconds = 256.00 MB/sec
>   Timing buffered disk reads:   84 MB in  3.03 seconds =  27.72 MB/sec

    scp uses ssh to copy file, which includes encryption and maybe
compression. Due to thus, the speed depends on the CPU speed too.

> 
> This should be ok, or?
> 
> Regards
> 
> Götz Reinicke
> -- 
> Götz Reinicke
> IT Koordinator - IT OfficeNet
> 
> Tel. +49 (0) 7141 - 969 420
> Fax  +49 (0) 7141 - 969 55 420
> goetz.reinicke at filmakademie.de
> 
> Filmakademie Baden-Württemberg
> Mathildenstr. 20
> 71638 Ludwigsburg
> www.filmakademie.de
> 
> 

-- 
Regards,
  Doncho N. Gunchev    Registered Linux User #291323 at counter.li.org
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