trouble shooting samba performance

[Sten Daniel Soersdal]

worms wrote:
> Hello,
> 
> 
> Can anyone point me to a guide on trouble shooting samba performance
> or a quick list of common issues I can check for.
> I've been googling but haven't found much that referenced a recent
> version of FreeBSD and Samba.
> 
> I am running FreeBSD 7.0 on VmWare Server 2.0 hosted on a CentOS Linux box.
> I've used nttcp and iozone to verify that the performance of the
> FreeBSD 7.0 VM is good and am able to copy 6.5GB on disk from one
> location to another in about 2.5 minutes.
> 
> Copying to a Windows 2003 server yields a 45 minute transfer time.
> 
> Copying to a Windows XP workstation yields a 4 minute transfer time
> 
> Summary:
> FreeBSD 7.0  --> FreeBSD 7.0  -- 2.5 minutes ( copying on disk )
> FreeBSD 7.0 --> WinXP -- 4 minutes ( samba )
> FreeBSD 7.0 -> Windows 2003 -- 45 minutes ( samba )
> WinXP --> Windows 2003 -- 5 minutes
> 
> Both windows machines are on the same domain.
> 
> I've used samba for a number of years and this is the first time I've
> ran into a problem such as this.
> 
> So if someone could give me a good starting point on how to
> troubleshoot this I'd appreciate it.
> 
> Thanks
> --Lance

The numbers indicate something i've seen several times but there has 
been different answers to it. Sometimes it was the indication that the 
RAID on the Windows2003 server was misconfigured or running in DEGRADED 
mode.
However i've also seen issues regarding TCP/IP settings.
Often it can be a good exercise to try to toggle this sysctl before 
transfer (net.inet.tcp.delayed_ack).
Of course these are just clues and not real answers.

-- 
Sten Daniel Soersdal