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Re: [Samba] Speedup windows client [was] What is the maximum speed for download from a samba share

Am 25.04.2018 um 09:56 schrieb L.P.H. van Belle via samba:
As counter example.
My slowest server, AMD E350 2 core, max 1.6Gz.
On 1Gb lan, disk 2x 5400rpm software raid 1 + 1 ssd.

Copy Speed 115Mb/s as in max 1Gb bandwith, from a win7 and win10 pc to the raid1.

File sizes.
100Mb+ get max 115Mb/s 		to a 4MB blocksized partition.
1-10mb files ,max 90-115Mb/s 	 to a 1MB blocksized partition.
0.0-1mb files  ,max 60-100Mb/s to a 4k blocksized partition.

I get these speeds while im watching my kodi. ;-)  Samba 4.6.x on ubuntu 17.10
One note here, i use kernel 4.16.1 from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=M;O=D
Thats mostly for kodi and the amd GPU driver, but i do notice bit better perfomance with these higher kernels.

Is the Lenovo Thinkpad T520 with Windows 7, connecting over Wifi?
Because on wifi, even if i set my laptop 3 meters from the AP, i dont get max.
About 1/2 the speeds, if lucky 3/4 the above speeds.
Test you wifi with inSSIDer, optimze the chanels.
Gave me about +25% speed at home on the wifi.

one of the  virtual machine is the samba VM connected via VPN
Looking to the cpu usage of this VM ist nearly zero during downloads.
Did you tweak your MTU sizes?
With things like :
iptables -A PREROUTING --match policy --pol ipsec --dir in -i eth+ -p tcp -m tcp --tcp-flags SYN,RST SYN -m tcpmss --mss 1361:1536 -j TCPMSS --set-mss 1360
Maybe disable Path MTU discovery to prevent packet fragmentation problems. Helps alo  (  net/ipv4/ip_no_pmtu_disc=1  )

Last, login on the proxymod monitor IRQ use, if you have extra cards in the server
it is a virtual machine on a proxmox root server
I just realized that the data transfer rate is going down after a while also on a linux workstation to the same slow speed as on windows workstation.
the root server is nearly idle
top - 16:46:31 up 313 days,  4:45,  1 user,  load average: 0.25, 0.42, 0.39
Tasks:  39 total,   1 running,  38 sleeping,   0 stopped,   0 zombie
%Cpu(s):  0.7 us,  2.9 sy,  0.0 ni, 96.2 id,  0.0 wa,  0.0 hi,  0.1 si,  0.0 st
KiB Mem:   2097152 total,   767176 used,  1329976 free,        0 buffers
KiB Swap:  2097152 total,    61172 used,  2035980 free,   725864 cached

here the smb.conf



nt acl support = no

  vfs object = recycle
  recycle:repository = Papierkorb
  recycle:keeptree = Yes
  recycle:touch = Yes
  recycle:versions = Yes
  recycle:maxsize = 0
  vfs objects = acl_xattr
  map acl inherit = Yes
  unix charset = ISO-8859-1
  display charset = ISO-8859-1
  security = share
  share modes = yes
  server string = %h server
  dns proxy = no
  bind interfaces only = yes
  disable netbios = yes
  smb ports = 445
  client NTLMv2 auth = yes
  log file = /var/log/samba/log.%m
  max log size = 1000
  syslog = 0
   panic action = /usr/share/samba/panic-action %d

   encrypt passwords = true
   passdb backend = tdbsam
   obey pam restrictions = yes
   unix password sync = yes
   passwd program = /usr/bin/passwd %u
   passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
   pam password change = yes
   map to guest = bad user
   load printers = no
   printing = bsd
   printcap name = /dev/null
   disable spoolss = yes
   usershare allow guests = no

min receivefile size = 2048
use sendfile = true
aio read size = 2048
aio write size = 2048
write cache size = 1024000
read raw = yes
write raw = yes
getwd cache = yes
oplocks = yes
max xmit = 32768
dead time = 15
large readwrite = yes

   comment = Home Directories
   browseable = yes
   read only = no
   valid users = %S

  vfs object = recycle
  recycle:repository = Papierkorb
  recycle:keeptree = Yes
  recycle:touch = Yes
  recycle:versions = Yes
  recycle:maxsize = 0
  path = /var/datas/test/
  public = yes
  writable = yes
  read only = no
  comment = smb share
  printable = no
  guest ok = yes
  create mode = 0775
  force user = root
  force group = root

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