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

[Volker Lendecke]

On Thu, Apr 17, 2014 at 02:03:37AM +0200, Oliver Lehmann wrote:
> Hi,
> 
> I tried upgrading from my Samba 3 setup to Samba 4.1.6 - I do not need all
> those AD-Features, I just need to mount the shares on two Windows 7 systems.
> Nothing more or less - this is the only feature I need.
> 
> I use the same configuration that I used with Samba 3 (testparm says it
> is fine).
> 
> 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.

Volker

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