[Samba] Samba 4 is half as fast as Samba 3?!

[Volker Lendecke]

On Thu, Apr 17, 2014 at 10:41:47AM +0200, Oliver Lehmann wrote:
> Hi Volker,
> 
> Volker Lendecke <Volker.Lendecke at sernet.de> wrote:
> 
> >On Thu, Apr 17, 2014 at 02:03:37AM +0200, Oliver Lehmann wrote:
> >>
> >>The simple question is - why do I reach transfer rates of ~110MB/Sec with
> >>Samba 3 and only ~45 MB/Sec with Samba 4? With such a mega-drop in
> >>performance Samba 4 seems not to be an alternative for me? :( :(
> >
> >What is your test case? Can you post more details? A few
> >seconds worth of tcpdump might show a bit more.
> 
> The testcase is just copying an 18GB file from my Windows 7 C:\ Drive
> to the Samba share.
> 
> tcpdump for Samba 4:
> http://pastebin.com/QpaFG8LD
> 
> tcpdump for Samba 3:
> http://pastebin.com/cYNk9ZnW
> 
> Is a more verbose tcpump needed?

What would help would be a raw tcpdump written with -w.

With best regards,

Volker Lendecke

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