[Samba] performance problem ???

[vincent blondel]

Hi,

I got a similar problem with my test configuration. 

I am using share drives from my AMD Athlon XP 1600+ / 512 DDR RAM running with NT4 workstation and my linux server is a Slackware 8.0 with kernel 2.4.18 and Samba 2.2.4 running on a Pentium 166 MMX / 128 RAM / U160 40Gb SCSI disk.

My problem is a bit different. I get well a lot of performance but my connections often break. So I can well listen to music ( mp3 files on a share drive ) and at the same time loading big *.PDF files ( 15 Mb ) but it doesn't work for a long time. After a few minutes, connection breaks and all my file windows applications are not responding any more. So I have to wait a few minutes before I can restore my share connections.

I found on Internet the following ways to optimize samba and/or linux

linux
  echo "80 500 64 64  15  6000 6000 1884 2" > /proc/sys/vm/bdflush 
  echo "60 10 60" > /proc/sys/vm/buffermem ( doesn't work because I don't have this file in my /proc filesystem ??? )

samba
  write cache size = 262144
  read size = 65536
  socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192 IPTOS_THROUGHPUT 
  wide links = yes

I use all these options but my problem is and stay until now. This option "IPTOS_THROUGHPUT" improved a lot my performance connections, so I can do a lot at the same time with my share drives.

If you have an idea for my problem, help would be appreciated ...
Thanks
Vincent

####################################################################################################
# This is the main Samba configuration file. You should read the
# smb.conf(5) manual page in order to understand the options listed
# here. Samba has a huge number of configurable options (perhaps too
# many!) most of which are not shown in this example
#
# Any line which starts with a ; (semi-colon) or a # (hash) 
# is a comment and is ignored. In this example we will use a #
# for commentry and a ; for parts of the config file that you
# may wish to enable
#
# NOTE: Whenever you modify this file you should run the command "testparm"
# to check that you have not many any basic syntactic errors. 
#
#======================= Global Settings =====================================
[global]

# workgroup = NT-Domain-Name or Workgroup-Name, eg: LINUX2
   workgroup = WORKGROUP

# server string is the equivalent of the NT Description field
   server string = Samba Server

# This option is important for security. It allows you to restrict
# connections to machines which are on your local network. The
# following example restricts access to two C class networks and
# the "loopback" interface. For more examples of the syntax see
# the smb.conf man page
   hosts allow = 192.168.123.1 192.168.123.2 192.168.123.3

# If you want to automatically load your printer list rather
# than setting them up individually then you'll need this
   load printers = yes

# you may wish to override the location of the printcap file
;   printcap name = /etc/printcap

# on SystemV system setting printcap name to lpstat should allow
# you to automatically obtain a printer list from the SystemV spool
# system
;   printcap name = lpstat

# It should not be necessary to specify the print system type unless
# it is non-standard. Currently supported print systems include:
# bsd, sysv, plp, lprng, aix, hpux, qnx
;   printing = bsd

# Uncomment this if you want a guest account, you must add this to /etc/passwd
# otherwise the user "nobody" is used
;  guest account = pcguest

# this tells Samba to use a separate log file for each machine
# that connects
   log file = /var/log/samba.%m

# Put a capping on the size of the log files (in Kb).
   max log size = 50

# Security mode. Most people will want user level security. See
# security_level.txt for details.  NOTE:  To get the behaviour of
# Samba-1.9.18, you'll need to use "security = share".
   security = user

# Use password server option only with security = server
# The argument list may include:
#   password server = My_PDC_Name [My_BDC_Name] [My_Next_BDC_Name]
# or to auto-locate the domain controller/s
#   password server = *
;   password server = <NT-Server-Name>

# Note: Do NOT use the now deprecated option of "domain controller"
# This option is no longer implemented.

# You may wish to use password encryption. Please read
# ENCRYPTION.txt, Win95.txt and WinNT.txt in the Samba documentation.
# Do not enable this option unless you have read those documents
  encrypt passwords = yes

# Where to find the SSL certificates:
;   ssl CA certDir = /etc/ssl/certs

# Using the following line enables you to customise your configuration
# on a per machine basis. The %m gets replaced with the netbios name
# of the machine that is connecting
;   include = /usr/local/samba/lib/smb.conf.%m

# This option allows Samba to improve performance on systems where the disk
# subsystem is a bottleneck. The value of this option is specified in bytes, and a 
# size of 262,144 represent a 256k cache size per file
write cache size = 262144
read size = 65536
#read prediction = true

# Most people will find that this option gives better performance.
# See speed.txt and the manual pages for details
# You may want to add the following on a Linux system:
   #socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
   socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192 IPTOS_THROUGHPUT 
   #socket options = IPTOS_LOWDELAY TCP_NODELAY

# Configure Samba to use multiple interfaces
# If you have multiple network interfaces then you must list them
# here. See the man page for details.
#   interfaces = 192.168.123.3/24 
    interfaces = eth0 192.168.123.3

# Browser Control Options:
# set local master to no if you don't want Samba to become a master
# browser on your network. Otherwise the normal election rules apply
;   local master = no

# OS Level determines the precedence of this server in master browser
# elections. The default value should be reasonable
;   os level = 33

# Domain Master specifies Samba to be the Domain Master Browser. This
# allows Samba to collate browse lists between subnets. Don't use this
# if you already have a Windows NT domain controller doing this job
;   domain master = yes 

# Preferred Master causes Samba to force a local browser election on startup
# and gives it a slightly higher chance of winning the election
;   preferred master = yes

# Enable this if you want Samba to be a domain logon server for 
# Windows95 workstations. 
;   domain logons = yes

# if you enable domain logons then you may want a per-machine or
# per user logon script
# run a specific logon batch file per workstation (machine)
;   logon script = %m.bat
# run a specific logon batch file per username
;   logon script = %U.bat

# Where to store roving profiles (only for Win95 and WinNT)
#        %L substitutes for this servers netbios name, %U is username
#        You must uncomment the [Profiles] share below
;   logon path = \\%L\Profiles\%U

# Windows Internet Name Serving Support Section:
# WINS Support - Tells the NMBD component of Samba to enable it's WINS Server
;   wins support = yes

# WINS Server - Tells the NMBD components of Samba to be a WINS Client
# Note: Samba can be either a WINS Server, or a WINS Client, but NOT both
;   wins server = w.x.y.z

# WINS Proxy - Tells Samba to answer name resolution queries on
# behalf of a non WINS capable client, for this to work there must be
# at least one WINS Server on the network. The default is NO.
;   wins proxy = yes

# DNS Proxy - tells Samba whether or not to try to resolve NetBIOS names
# via DNS nslookups. The built-in default for versions 1.9.17 is yes,
# this has been changed in version 1.9.18 to no.
;   dns proxy = no 


# This option, if set to no, tells Samba not to follow symbolic links outside
# of an area designated as being exported as a share point. In order to determine if a 
# link points outside the shared area, Samba has to follow the link and then do a 
# directory path lookup to determine where on the file system the link ended up.
# This ends up adding a total of six extra system calls per filename lookup, and 
# Samba looks up filenames a lot.
wide links = yes

#============================ Share Definitions ==============================
;[homes]
;   comment = Home Directories
;   browseable = no
;   writable = yes

# Un-comment the following and create the netlogon directory for Domain Logons
; [netlogon]
;   comment = Network Logon Service
;   path = /usr/local/samba/lib/netlogon
;   guest ok = yes
;   writable = no
;   share modes = no


# Un-comment the following to provide a specific roving profile share
# the default is to use the user's home directory
;[Profiles]
;    path = /usr/local/samba/profiles
;    browseable = no
;    guest ok = yes


# NOTE: If you have a BSD-style print system there is no need to 
# specifically define each individual printer
;[printers]
;   comment = All Printers
;   path = /var/spool/samba
;   browseable = no
# Set public = yes to allow user 'guest account' to print
;   guest ok = no
;   writable = no
;   printable = yes

# This one is useful for people to share files
;[tmp]
;   comment = Temporary file space
;   path = /tmp
;   read only = no
;   public = yes

# A publicly accessible directory, but read only, except for people in
# the "staff" group
;[public]
;   comment = Public Stuff
;   path = /home/samba
;   public = yes
;   writable = yes
;   printable = no
;   write list = @staff

[vincent]
    comment = local user 
    path = /CORP/HOMES/vincent
    public = no
    writable = yes

[web]
    comment = web DDEV00
    path = /CORP/www
    public = no
    writable = yes

[doc]
   comment = documentation
   path = /CORP/shares/doc
   public = no
   writable = yes

[win32]
   comment = softs win32
   path = /CORP/shares/softs/win32
   public = no
   writable = yes

[pkg_win32]
   comment = packages
   path = /CORP/shares/install
   public = no
   writable = yes


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