[Samba] Decent Performance

[Udo Kaune]

Hi all,

I am trying to get some decent speed out of a vanilla Debian (Proxmox) box and
am running out of ideas. Basically I can exchange data at 110MB/sec (raw, nfs,
ftp) but not with Samba shares.

I tried almost every samba tuning tip I could find to no avail. The only
optimisation left to smb.conf at the moment is debug level = 0. As one can see
the robocopy throughput is merely half of what would be expected.

Any hints?

Best regards
Udo

root at atlas:# dmesg | grep DMI
DMI present
DMI: Supermicro X8ST3/X8ST3, BIOS 2.0        07/29/10

#root at atlas:# lspci | grep Ethernet
07:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
08:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection

root at atlas:# uname -an
Linux atlas 2.6.32-31-pve #1 SMP Thu Jul 24 06:44:16 CEST 2014 x86_64 GNU/Linux

root at atlas:# modinfo e1000e
filename:       /lib/modules/2.6.32-31-pve/kernel/drivers/net/e1000e/e1000e.ko
version:        3.0.4.1-NAPI
license:        GPL
description:    Intel(R) PRO/1000 Network Driver
author:         Intel Corporation, <linux.nics at intel.com>
vermagic:       2.6.32-31-pve SMP mod_unload modversions

root at atlas:/# smbd --version
Version 3.6.6

write to local disk at max:
root at atlas:/# dd if=/dev/zero of=/var/opt/vz/test.bin bs=1M count=100000
100000+0 records in
100000+0 records out
104857600000 bytes (105 GB) copied, 790.853 s, 133 MB/s

read from local disk at max:
root at atlas:/# dd if=/var/opt/vz/test.bin of=/dev/null
204800000+0 records in
204800000+0 records out
104857600000 bytes (105 GB) copied, 771.101 s, 136 MB/s

netio session: debian server, windows 2003 client
NETIO - Network Throughput Benchmark, Version 1.32
(C) 1997-2012 Kai Uwe Rommel
TCP connection established.
Packet size  1k bytes:  110.49 MByte/s Tx,  112.27 MByte/s Rx.
Packet size  2k bytes:  110.12 MByte/s Tx,  112.03 MByte/s Rx.
Packet size  4k bytes:  112.32 MByte/s Tx,  112.06 MByte/s Rx.
Packet size  8k bytes:  112.48 MByte/s Tx,  112.17 MByte/s Rx.
Packet size 16k bytes:  112.25 MByte/s Tx,  111.97 MByte/s Rx.
Packet size 32k bytes:  112.82 MByte/s Tx,  112.08 MByte/s Rx.

ftp session:  debian server, windows 2003 client
RETR test.bin
150 Opening BINARY mode data connection for test.bin (2035077419 bytes)
Download: 2.017.771.748 Bytes, 114377 kbytes/s
Waiting for server reply...
226 Transfer complete
Copied (05.09.2014 23:22:00): ftp://atlas//test.bin -> d:\temp\test.bin
2.035.077.419 Bytes, 109933 kbytes/s

robocopy: debian server, windows 2003 client
d:\>robocopy z:\ d:\temp test.bin

            Total    Copied   Skipped  Mismatch    FAILED    Extras
Bytes :   1.895 g   1.895 g         0         0         0         0
Times :   0:00:40   0:00:40                       0:00:00   0:00:00
Speed :               49902 KBytes/sec.
Speed :                2855 MBytes/min.