samba - Jan 2009 - poor read/write performance due to TCP window size configuration

Hi,

I am using a TCP link that requires TCP window size to be at least 256K.

Below is my smb.conf file.
I have tried to capture the packets using wireshark after the configuration. 
However, the TCP windows size still cap at about 64k

How should I configure it?  My samba version is Version 3.0.24-11.fc6

Thank You.

Best Regards,
Gary

[global]
   workgroup = TESTBED
   server string = Samba Server
   security = user
   log level = 0
   read raw = yes
   write raw = yes
   kernel oplocks = yes
   max xmit = 262144
   dead time = 15
   getwd cache = yes
   encrypt passwords = yes
   log file = /var/log/samba/%m.log
   max log size = 50
   smb passwd file = /etc/samba/smbpasswd
   netbios name = stgsvr01
   disable spoolss = yes
   show add printer wizard = no
   cups options = raw
   socket options = TCP_NODELAY SO_RCVBUF=262144 SO_SNDBUF=262144 IPTOS_LOWDELAY

#============================ Share Definitions =============[teststg01]
   path = /mnt/thumb
   hosts allow = 192.168.37.199
   delete readonly = yes
   oplocks = yes
   read only = no
   browseable = yes
   valid users = teststg01

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Thank you!

I haven't played around with this much but I seem to recall reading  
that things in packet/window size seem to work on a lowest common  
denominator approach. Does something in the path not have the window  
scale option enabled? The "old" standard had a max size for the window
of 64k. According to: http://en.wikipedia.org/wiki/TCP_window_scale_option

routers and firewalls are notorious for not implementing TCP Window  
scaling.
On Jan 5, 2009, at 10:44 AM, Low Tee Chong wrote:
> Hi,
>
> I am using a TCP link that requires TCP window size to be at least  
> 256K.
>
> Below is my smb.conf file.
> I have tried to capture the packets using wireshark after the  
> configuration.  However, the TCP windows size still cap at about 64k
>
> How should I configure it?  My samba version is Version 3.0.24-11.fc6
>
> Thank You.
>
> Best Regards,
> Gary
>
> [global]
>   workgroup = TESTBED
>   server string = Samba Server
>   security = user
>   log level = 0
>   read raw = yes
>   write raw = yes
>   kernel oplocks = yes
>   max xmit = 262144
>   dead time = 15
>   getwd cache = yes
>   encrypt passwords = yes
>   log file = /var/log/samba/%m.log
>   max log size = 50
>   smb passwd file = /etc/samba/smbpasswd
>   netbios name = stgsvr01
>   disable spoolss = yes
>   show add printer wizard = no
>   cups options = raw
>   socket options = TCP_NODELAY SO_RCVBUF=262144 SO_SNDBUF=262144  
> IPTOS_LOWDELAY
>
> #============================ Share Definitions =============>
[teststg01]
>   path = /mnt/thumb
>   hosts allow = 192.168.37.199
>   delete readonly = yes
>   oplocks = yes
>   read only = no
>   browseable = yes
>   valid users = teststg01
>
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> please send e-mail to admin@dsi.a-star.edu.sg with the subject  
> "Unsubscribe".
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> Please remember to include the body text received.
> Removal requests will be honored and respected. Please allow 1 to 3  
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> You may still receive other e-mails from us within the grace period.
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> 3) As an anti-virus measure, our mail server rejects the following
> attachments:
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> *.shs; *.vb*; *.{*, *.js, *.sct, *.wsh, *.jse, *.swf.
>
> If you need to send us an attachment of this type, please contact us
> at helpline@dsi.a-star.edu.sg.
>
> Thank you!
>
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