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

[Oliver Lehmann]

Hi,

Volker Lendecke <Volker.Lendecke at sernet.de> wrote:

> On Sat, Apr 19, 2014 at 10:48:22AM +0200, Oliver Lehmann wrote:
>>
>> With SMB2 I reach arround 85MB/sec
>> With SMB3 I had 45MB/sec
>> With NT1 I have 110MB/sec
>
> What kind of client is this?

Win7. I wondered, why there was a difference between SMB3 and SMB2
as Win7 should only work with SMB2 anyway. I then tried Jumbo-Frames
(9000 MTU) but noticed a slow down by using that. I then switched
back to 1500 and now I'm not able to detect any differences If I
use SMB2, SMB3 or NT1. I verified with Wireshark that the Win7
realy uses SMB2 if SMB2 or SMB3 is specified on Samba, and SMB if
NT1 is specified. I always reach now arround 110MB/sec. I can not
explain this. I really tried so many different settings in the past,
did plenty of restarts and I can not tell you why I can no longer
reproduce the bad transfer rates any longer :(