Linux-Mint : poor samba performance

Hi,

I've got very poor samba performance (r/w) from my LinuxMint Laptop (dual-boot) to my OMV-server.

Speed (r/w) with LinuxMint:
SMB: 3 MB/s (mounted with nemo)
SSH: 40 MB/s

Speed (r/w) with Win10:
SMB: 35 MB/s

Client:
Dual-boot laptop with WiFi AC (connected above 600 mb/s).
Win10
LinuxMint 18.3 cinnamon

Server:
HP-N54L (connected 1gb/s, wired)
OMV 4.0.14-1

So, obvisously there is a problem with the SMB Mint-Client and the server.

Which experience have other users with minit or ubuntu client?
Any ideas to get LinuxMint performing like expected?

Zitat von ryecoaaron

Are you sure the wireless is connecting at the same speed on Linux Mint? My xps13 doesn't on Ubuntu 18. Samba speed is just fine with a usb network adapter.

Yes it does. Checked it with iwconfig.
I tested also with an usb adapter. Of cource better, but the ratio between SMB and SSH was the same.
SMB was also poor.

Zitat von ryecoaaron

Do you have any samba optimizations in extra options on the samba settings tab?

No, nothing at all.

Zitat von subzero79

Also I would try not mount with nemo. Test using the mount smb command manually.

Good point.
I mounted manually with an entry in fstab:

//server.lan/homes/user /home/user/server cifs rw,user,noauto 0 0

and

user@mint ~ $ mount /home/user/server

in the terminal.

Now things go crazy:
Up- and download speeds rise up to 40 MBytes/s. That quite OK and expected.
When I replace a file on the client-side, the speed drops down to 20 MByte/s, which is acceptable.

But if I replace a file on the server-side, the speed drops down to 300 kByte/s.
Tried to force SMBv2 on the client side, but that made no difference.

I'm running out of ideas...

Zitat von ryecoaaron

Did you add any of the tuning parameters from the tuning threads?

...too stupid, to find them.
You have a link for me?

But in the meantime I investigated a little bit more and found out that
cache=loose
on the client-side enhances the perfomance dramatically:
File replacement on the server-side is now 20 MByte/s (coming from 300kByte/s).
But this also reduced download speeds to 20 MByte/s.

Here my actual mount:

//server.lan/homes/user on /home/user/server type cifs (rw,nosuid,nodev,relatime,vers=2.0,sec=ntlmssp,cache=loose,username=xxxx,domain=,uid=1000,forceuid,gid=1000,forcegid,addr=192.168.1.8,file_mode=0755,dir_mode=0755,nounix,serverino,mapposix,rsize=65536,wsize=65536,echo_interval=60,actimeo=1)

I'm not trying to get the last 10%.
I'm just trying to get an acceptable performance.
So I ask myself, why are the default settings so "unusable" in LinuxMint.

The tuning tips did not change performance dramatically.

For me, these steps brought reasonable speed:

Mount manually. Do not use nemo.
Use parameters "vers=3.0" and "cache=loose" in fstab.