[Samba] Very Slow!

Adam Tauno Williams adamtaunowilliams at gmail.com
Fri Aug 29 15:54:22 GMT 2008

On Fri, 2008-08-29 at 10:49 -0400, Gerald Drouillard wrote:
> 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.

Try unbonding the NICs and just running over one NIC.

> >     /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.

Agree, every time I've seen "slow Samba" it isn't because of Samba but
the result of some underlying issue.

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