[mythtv-users] OT: SMB performance?

[Jon Heizer]

On Fri, Jan 20, 2012 at 8:00 AM, Ian Clark <mrrooster at gmail.com> wrote:

> On 19 January 2012 20:21, Ben Kamen <bkamen at benjammin.net> wrote:
> > As a sidenote: I realized after sending my initial reply that my windows
> box (The realtek equipped one) had jumbo frames turned off.
> >
> > So I turned it back on -- and tried all sorts of settings from 4k-9k.
> >
> > Best performance? Jumbo Frames turned off.
> >
> > Go figure.
> >
> I found performance increased slightly with jumbo frames turned on,
> between a Win 7 box and my main server running NetBSD/samba
> 3.somethingorother.
>
> However.....
>
> > Turns out now that I read about, the RealTek Gb NIC's have issues.
> hahahah...
> >
> .....I did hit that problem.
>
> I have also had serious problems with realtek NICs in general though,
> replaced my home NICs with intel stuff (just the 1000/pro pci and
> pci-e cheap cards), everything is much more reliable now.
>
> I also needed a switch that supported it or things just stopped
> working (but reading your hardware specs it sounds like that's not a
> problem you'll have. ;) )
>
> Have you checked your SMB protocol level settings? The support for
> SMB2 is quite new in samba, and it certanly wasn't enabled as standard
> last time I checked. (This may have been a long time ago now.)
>
> In your smb.conf, in the [global] section, try 'max protocol = smb2'
>
> see if it helps.
>
> I get about 40MB/sec to/from my samba box to my win7 box, which I
> think is about the max my network supports (iftop watching a very
> simple client/server sending data across a socket seemed to indicate
> this speed too.)
>
> Ian
>
>
Well I feel like the odd man out.  My file server was recently reinstalled
with ubuntu 11.10, I don't use jumbo frames as last time I tried to years
ago it was a failure, and have not tweaked the smb.confg at all.  Although
I do see a comment in there suggesting the changes you guys have
mentioned.  I am able to write from win7 to a raid5 array of 4 2TB disks at
100MB/sec.  Reads were at about 85MB/sec until I put in the sockets options
above and that raised them to more like 90MB/s.

Jon
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