[Samba] Samba transfer rate slower than ftp

[Volker Lendecke]

On Wed, Jun 23, 2010 at 12:26:04PM +0200, Francois Lepretre wrote:
> I have a file server under Debian Lenny, with a 41TB file system (XFS,  
> 24 x 2TB hard drives on RAID 6 on an Areca card)
>
> Reading files with ftp works like a charm and we easily reach the 125  
> MB/s limit of the GB ethernet card.
>
> But when reading files (on the same clients) from a samba share, we get  
> around 60 MB/s.
> Clients are Windows XP 64 and Seven 64 and show the same performances.
>
> Sadly enough, this server has a 'twin brother' (same hardware) that runs  
> Windows Server 2008, and reading from a share on it gives a nice 100MB/s.
>
>
> So why is the samba share so 'slow' compared to ftp or the windows server ?
>
> Here is the smb.conf (samba version is 3.2.5)
>
> -------------------------------------------------------------
> [global]
>
>    workgroup = WIZZ
>    server string = Prod1 File Server %v
>    log file = /var/log/samba/log.%m
>    max log size = 50
>    security = share
>    encrypt passwords = yes
>    socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=8192  
> SO_SNDBUF=8192

Please remove the "socket options" and retry :-)

If it's still slow, I'll ask for network traces...

Thanks,

Volker
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