[Samba] Very Slow!

Gerald Drouillard gerrylist at drouillard.ca
Fri Aug 29 14:49:03 GMT 2008

Brian McGrew wrote:
> System info:
>     Red Hat Enterprise Linux Server release 5 (Tikanga)
>     Kerlen 2.6.18-8.el5 SMP x86_64
>     Samba version 3.0.23c-2
>     Eth0 && Eht1 bonded to bond0, 2Gbps.
>     /etc/samba/smb.conf attached below...
> I¹m seeing very slow transfers from Samba....  I¹m not sure how else to
> describe it.  If I try and copy a 4GB DVD image from the server to any
> Windows box (XP, 2003, 2008, MacOS) it estimates more than 4 hours to copy.
> However, if I FTP to the server from any given client I can move the whole
> file in less than 2 minutes...
> I¹m not a Samba expert, so anything is helpful at this point!!!
Have you tried looking into some of the NIC jumbo frames, flow control 
and checksum settings?

Look at the window client settings for:
-Tx/Rx Checksum Offload Disabled
-Flow Control Enabled
-Jumbo Frames Enabled
-Large Send Offload Disabled

Your results will very depending on your switches and network cards.

For more look at a discussion at:

Gerald Drouillard
Technology Architect
Drouillard & Associates, Inc.

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