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Thread: Network Weirdness

  1. #1
    Fried Chip Extremist alsenior's Avatar
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    Network Weirdness

    Here's the back story

    I bought a gigabit switch and the network seams to have gone a bit weird

    The Hardware:
    File server :
    Dual xeon 2.8
    2gb of ram
    3 x 250gb seagate drives in raid 3 on a netcell controller

    My computer
    See my system

    What happens is that when copying a file from the file server to the desktop it copys at a rate of ~9MB/s which seams a bit wrong because when it was on a 10/100 switch it was around 10MB/s. but the more weird thing is that when i copy to the server i get a rate of 23MB/s which would be more reasonable speed if it was also the Copy from speed.

    The file server is running Ubuntu linux 8.10 with a server 2.6.27 kernel and my desktop is running Vista X64 i have looked for misconfigured settings on both ends but i can't understand what is happening
    Quote Originally Posted by Jay View Post
    What kind of emergency would need Windows 95? I think you are already in a bad state of emergency when your backup plan is Windows 95.
    Beginners guide to raid Beginners guide to raid post edition Hexus.Social - FAQ

  2. #2
    The King of Vague Steve B's Avatar
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    Re: Network Weirdness

    i take it you're running samba shares?
    if so, can you print smb.conf?

  3. #3
    Fried Chip Extremist alsenior's Avatar
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    Re: Network Weirdness

    Code:
    #
    # Sample configuration file for the Samba suite for Debian GNU/Linux.
    #
    #
    # 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 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 commentary 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 made any basic syntactic 
    # errors. 
    #
    
    #======================= Global Settings =======================
    
    [global]
    
    ## Browsing/Identification ###
    
    # Change this to the workgroup/NT-domain name your Samba server will part of
       workgroup = MSHOME
    
    # server string is the equivalent of the NT Description field
       server string = %h server (Samba, Ubuntu)
    
    # Windows Internet Name Serving Support Section:
    # WINS Support - Tells the NMBD component of Samba to enable its WINS Server
    ;   wins support = no
    
    # 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
    
    # This will prevent nmbd to search for NetBIOS names through DNS.
       dns proxy = no
    
    # What naming service and in what order should we use to resolve host names
    # to IP addresses
    ;   name resolve order = lmhosts host wins bcast
    
    #### Networking ####
    
    # The specific set of interfaces / networks to bind to
    # This can be either the interface name or an IP address/netmask;
    # interface names are normally preferred
    ;   interfaces = 127.0.0.0/8 eth0
    
    # Only bind to the named interfaces and/or networks; you must use the
    # 'interfaces' option above to use this.
    # It is recommended that you enable this feature if your Samba machine is
    # not protected by a firewall or is a firewall itself.  However, this
    # option cannot handle dynamic or non-broadcast interfaces correctly.
    ;   bind interfaces only = true
    
    
    
    #### Debugging/Accounting ####
    
    # This tells Samba to use a separate log file for each machine
    # that connects
       log file = /var/log/samba/log.%m
    
    # Put a capping on the size of the log files (in Kb).
       max log size = 1000
    
    # If you want Samba to only log through syslog then set the following
    # parameter to 'yes'.
    ;   syslog only = no
    
    # We want Samba to log a minimum amount of information to syslog. Everything
    # should go to /var/log/samba/log.{smbd,nmbd} instead. If you want to log
    # through syslog you should set the following parameter to something higher.
       syslog = 0
    
    # Do something sensible when Samba crashes: mail the admin a backtrace
       panic action = /usr/share/samba/panic-action %d
    
    
    ####### Authentication #######
    
    # "security = user" is always a good idea. This will require a Unix account
    # in this server for every user accessing the server. See
    # /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/ServerType.html
    # in the samba-doc package for details.
    ;   security = user
    
    # You may wish to use password encryption.  See the section on
    # 'encrypt passwords' in the smb.conf(5) manpage before enabling.
       encrypt passwords = true
    
    # If you are using encrypted passwords, Samba will need to know what
    # password database type you are using.  
       passdb backend = tdbsam
    
       obey pam restrictions = yes
    
    ;   guest account = nobody
       invalid users = root
    
    # This boolean parameter controls whether Samba attempts to sync the Unix
    # password with the SMB password when the encrypted SMB password in the
    # passdb is changed.
    ;   unix password sync = no
    
    # For Unix password sync to work on a Debian GNU/Linux system, the following
    # parameters must be set (thanks to Ian Kahan <<kahan@informatik.tu-muenchen.de> for
    # sending the correct chat script for the passwd program in Debian Sarge).
       passwd program = /usr/bin/passwd %u
       passwd chat = *Enter\snew\sUNIX\spassword:* %n\n *Retype\snew\sUNIX\spassword:* %n\n *passwd:*password\supdated\ssuccessfully* .
    
    # This boolean controls whether PAM will be used for password changes
    # when requested by an SMB client instead of the program listed in
    # 'passwd program'. The default is 'no'.
    ;   pam password change = no
    
    ########## Domains ###########
    
    # Is this machine able to authenticate users. Both PDC and BDC
    # must have this setting enabled. If you are the BDC you must
    # change the 'domain master' setting to no
    #
    ;   domain logons = yes
    #
    # The following setting only takes effect if 'domain logons' is set
    # It specifies the location of the user's profile directory
    # from the client point of view)
    # The following required a [profiles] share to be setup on the
    # samba server (see below)
    ;   logon path = \\%N\profiles\%U
    # Another common choice is storing the profile in the user's home directory
    ;   logon path = \\%N\%U\profile
    
    # The following setting only takes effect if 'domain logons' is set
    # It specifies the location of a user's home directory (from the client
    # point of view)
    ;   logon drive = H:
    ;   logon home = \\%N\%U
    
    # The following setting only takes effect if 'domain logons' is set
    # It specifies the script to run during logon. The script must be stored
    # in the [netlogon] share
    # NOTE: Must be store in 'DOS' file format convention
    ;   logon script = logon.cmd
    
    # This allows Unix users to be created on the domain controller via the SAMR
    # RPC pipe.  The example command creates a user account with a disabled Unix
    # password; please adapt to your needs
    ; add user script = /usr/sbin/adduser --quiet --disabled-password --gecos "" %u
    
    ########## Printing ##########
    
    # If you want to automatically load your printer list rather
    # than setting them up individually then you'll need this
    ;   load printers = yes
    
    # lpr(ng) printing. You may wish to override the location of the
    # printcap file
    ;   printing = bsd
    ;   printcap name = /etc/printcap
    
    # CUPS printing.  See also the cupsaddsmb(8) manpage in the
    # cupsys-client package.
       printing = cups
       printcap name = cups
    
    # When using [print$], root is implicitly a 'printer admin', but you can
    # also give this right to other users to add drivers and set printer
    # properties
    ;   printer admin = @lpadmin
    
    
    ############ Misc ############
    
    # 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 = /home/samba/etc/smb.conf.%m
    
    # Most people will find that this option gives better performance.
    # See smb.conf(5) and /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/speed.html
    # for details
    # You may want to add the following on a Linux system:
    #         SO_RCVBUF=8192 SO_SNDBUF=8192
       socket options = TCP_NODELAY
    
    # The following parameter is useful only if you have the linpopup package
    # installed. The samba maintainer and the linpopup maintainer are
    # working to ease installation and configuration of linpopup and samba.
    ;   message command = /bin/sh -c '/usr/bin/linpopup "%f" "%m" %s; rm %s' &
    
    # Domain Master specifies Samba to be the Domain Master Browser. If this
    # machine will be configured as a BDC (a secondary logon server), you
    # must set this to 'no'; otherwise, the default behavior is recommended.
    ;   domain master = auto
    
    # Some defaults for winbind (make sure you're not using the ranges
    # for something else.)
    ;   idmap uid = 10000-20000
    ;   idmap gid = 10000-20000
    ;   template shell = /bin/bash
    ;
    ; The following was the default behaviour in sarge
    ; but samba upstream reverted the default because it might induce
    ; performance issues in large organizations
    ; See #368251 for some of the consequences of *not* having
    ; this setting and smb.conf(5) for all details
    ;
    ;   winbind enum groups = yes
    ;   winbind enum users = yes
    
    #======================= Share Definitions =======================
    
    # Un-comment the following (and tweak the other settings below to suit)
    # to enable the default home directory shares.  This will share each
    # user's home directory as \\server\username
    ;[homes]
    ;   comment = Home Directories
    ;   browseable = no
    
    # By default, \\server\username shares can be connected to by anyone
    # with access to the samba server.  Un-comment the following parameter
    # to make sure that only "username" can connect to \\server\username
    # This might need tweaking when using external authentication schemes
    ;   valid users = %S
    
    # By default, the home directories are exported read-only. Change next
    # parameter to 'yes' if you want to be able to write to them.
    ;   writable = no
    
    # File creation mask is set to 0700 for security reasons. If you want to
    # create files with group=rw permissions, set next parameter to 0775.
    ;   create mask = 0700
    
    # Directory creation mask is set to 0700 for security reasons. If you want to
    # create dirs. with group=rw permissions, set next parameter to 0775.
    ;   directory mask = 0700
    
    # Un-comment the following and create the netlogon directory for Domain Logons
    # (you need to configure Samba to act as a domain controller too.)
    ;[netlogon]
    ;   comment = Network Logon Service
    ;   path = /home/samba/netlogon
    ;   guest ok = yes
    ;   writable = no
    ;   share modes = no
    
    # Un-comment the following and create the profiles directory to store
    # users profiles (see the "logon path" option above)
    # (you need to configure Samba to act as a domain controller too.)
    # The path below should be writable by all users so that their
    # profile directory may be created the first time they log on
    ;[profiles]
    ;   comment = Users profiles
    ;   path = /home/samba/profiles
    ;   guest ok = no
    ;   browseable = no
    ;   create mask = 0600
    ;   directory mask = 0700
    
    wins support = no
    [printers]
       comment = All Printers
       browseable = no
       path = /var/spool/samba
       printable = yes
       public = no
       writable = no
       create mode = 0700
    
    # Windows clients look for this share name as a source of downloadable
    # printer drivers
    [print$]
       comment = Printer Drivers
       path = /var/lib/samba/printers
       browseable = yes
       read only = yes
       guest ok = no
    # Uncomment to allow remote administration of Windows print drivers.
    # Replace 'ntadmin' with the name of the group your admin users are
    # members of.
    ;   write list = root, @ntadmin
    
    # A sample share for sharing your CD-ROM with others.
    ;[cdrom]
    ;   comment = Samba server's CD-ROM
    ;   writable = no
    ;   locking = no
    ;   path = /cdrom
    ;   public = yes
    
    # The next two parameters show how to auto-mount a CD-ROM when the
    #	cdrom share is accesed. For this to work /etc/fstab must contain
    #	an entry like this:
    #
    #       /dev/scd0   /cdrom  iso9660 defaults,noauto,ro,user   0 0
    #
    # The CD-ROM gets unmounted automatically after the connection to the
    #
    # If you don't want to use auto-mounting/unmounting make sure the CD
    #	is mounted on /cdrom
    #
    ;   preexec = /bin/mount /cdrom
    ;   postexec = /bin/umount /cdrom
    
    
    [shr]
    path = /home/alistair/shr
    available = yes
    browsable = yes
    public = yes
    writable = yes
    Quote Originally Posted by Jay View Post
    What kind of emergency would need Windows 95? I think you are already in a bad state of emergency when your backup plan is Windows 95.
    Beginners guide to raid Beginners guide to raid post edition Hexus.Social - FAQ

  4. #4
    The King of Vague Steve B's Avatar
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    Re: Network Weirdness

    can you comment out the line
    Code:
    obey pam restrictions = yes
    and re-run your tests.

    Then add the following line to the global stanza
    Code:
    server options = SO_SNDBUF=8192, SO_RCVBUF=8192
    and re-run again?

    I've got a gigabit switch in my network now, and everything seems to be going to pot

  5. #5
    Fried Chip Extremist alsenior's Avatar
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    • alsenior's system
      • Motherboard:
      • DFI Lanparty Jr x58-T3H6
      • CPU:
      • Core i7 920
      • Memory:
      • 6 x 2GB ocz Gold
      • Storage:
      • 1 TB Samsung F3
      • Graphics card(s):
      • 1gb 4890 vapor-x xfire
      • PSU:
      • xfx 850W
      • Case:
      • Lian-li Pc7
      • Operating System:
      • Windows 7 X64
      • Monitor(s):
      • Dell 2208WFP
      • Internet:
      • 30mb Virgin media

    Re: Network Weirdness

    just ran with the first edit and nothings changed.

    Edit: and the second has produced a minor improvement when reading from the server ( about 0.5MB/s increase) and has created about a 1MB/s increase when uploading
    Last edited by alsenior; 06-12-2008 at 01:03 AM.
    Quote Originally Posted by Jay View Post
    What kind of emergency would need Windows 95? I think you are already in a bad state of emergency when your backup plan is Windows 95.
    Beginners guide to raid Beginners guide to raid post edition Hexus.Social - FAQ

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