[Samba] samba 4.x slow ...

[Jeremy Allison]

On Thu, Nov 02, 2017 at 02:05:18PM +0100, Dr. Peer-Joachim Koch via samba wrote:
> Hi,
> 
> 
> we are running samba 4.4 on two machines as file servers.
> 
> Both are running a GFS (stornext). The storage is attached using 8G HBA.
> 
> You can get up to 800MB/s local speed. We are exporting the shares
> using 2x1GB
> 
> and 2x10G. However the clients are only getting 40-50MB/s. With
> samba3 I think we had up to 80-90MB/s.
> 
> Using a 100MB/s link for the client we see 12-13MB/s (wire speed).
> 
> Using NFS (3) we see up to 120MB/s (GB). How can we improve the speed ?
> 
> How can we find the bottle neck ? (I tested already various samba
> versions (4.4{5,6}) without
> 
> any success.

What clients ? What protocol are they using ? What is your
smb.conf. These are some basics we'll need to proceed.