[CentOS] Debugging/optimizing LAN/Fileserver Performance

Tue Aug 21 07:54:23 UTC 2012
Götz Reinicke <goetz.reinicke at filmakademie.de>

Am 21.08.12 09:37, schrieb Mogens Kjaer:
> On 08/21/2012 09:30 AM, Götz Reinicke wrote:
>> 564 root  20   0 98.5m 6872 2968 R 99.0  0.2   1:08.10 sshd
> 
> It looks like ssh is the rate limiting step in your rsync.
> 
> What cipher are you using for ssh?
> 
> I use
> 
> rsync --rsh='/usr/bin/ssh -c arcfour128' ...
> 
> that helps quite a bit on my hardware, your hardware might do better
> with another cipher.
> 
> You should check out https://bbs.archlinux.org/viewtopic.php?id=136713 
> to learn more about this.


Thanks, that shows a much different transfer speed :)

I was not thinking, that rsync also involves ssh and de/encryption speed
.. so the bottleneck looks like the cpu in my test.

	Thanks a lot I learned something new to me :) Regards . Götz

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