[Samba] Increasing samba performance

James Lamanna jlamanna at gmail.com
Wed Feb 1 19:29:47 GMT 2006


On 2/1/06, Jeremy Allison <jra at samba.org> wrote:
> On Wed, Feb 01, 2006 at 12:50:44PM -0600, Anthony Messina wrote:
> > Jeremy Allison wrote:
> > >On Wed, Feb 01, 2006 at 08:05:28AM -0800, James Lamanna wrote:
> > >
> > >>Hi.
> > >>
> > >>Between 2 linux (2.6.11 client and 2.6.14 server) machines connected by
> > >>a 100Mb link I get samba performance copying a file from the client to
> > >>the server through a smbmounted share of around 4.2MB/s
> > >>Is this to be expected? Or can it be improved (and if so, how?) I've
> > >>tried tweaking SO_(SND/RCV)BUF (after reading numerous articles on
> > >>samba performance...), but it doesn't seem to have any effect.
> > >>Unfortunately, I can't use jumbo frames at this moment either.
> > >>
> > >>I've tried this with shares on ReiserFS and XFS and there is no
> > >>difference in the transfer rate.
> > >>Both machines are not even close to maxxed on cpu (both are at around
> > >>10-15% cpu when the transfer is running).
> > >
> > >
> > >Add "use sendfile = yes", this should help.
> > >
> > >Jeremy.
> >
> > can you still use "sendfile = yes" if some of the things that a samba
> > server shares are nfs v3 mounts from another server?
>
> sendfile works if a file can be oplocked. If you're allowing
> oplocks onto that mounted filesystem then yes it can be used.
>
> Jeremy.
>

Unfortunately, setting sendfile to yes doesn't make a difference in
sending to or receiving from the samba server. I'm still stuck at
~4.40MB/s.
How does 4.40MB/s rate anyways? I assume samba should be quicker than that?

-- James


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