[Samba] samba 4.x slow ...

[Jeremy Allison]

On Fri, Nov 03, 2017 at 01:54:10PM +0100, Dr. Peer-Joachim Koch via samba wrote:
> Hi Micha,
> 
> no, I have to this. I'm normally just check what smbstatus shows:
> 
> 33837   BGC\pkoch    users        XXX (ipv4:XXX:51118)    SMB2_10
> 
> Bye the way - 45 MB/s is not so bad, I just wanted to know if it's
> possible to get 90MB/s or at 10G a little bit more.
> What has been messaured  ?
> 
> I used on a new HPC node (10G) smbclient to test the transfer speed
> and get (10G<->10G) 199MB (mtu 1500).
> 
> 33692     pkoch         users         10.0.3.100
> (ipv4:10.0.3.100:54821) NT1
> 
> Using smbclient (using NT1) we see the following values:
> 
> Cl             Server (using get)
> 10GB <-> 10GB      199MB/s
> 10GB <-> 2x1GB    162MB/s  (??? )
>   1GB <-> 2x1GB     60MB/s
> 
> 
> Cl             Server (using put)
> 10GB <-> 2x1GB    ~100MB/s
>   1GB <-> 2x1GB        50MB/s

Try using SMB3 (smbclient -mSMB3). See if that makes a difference.