[Samba] Problems with OS X 10.11.5

[Seth Goldin]

I'm actually seeing from the Apple Support Communities thread that this
might all be due to the fact that OS X 10.11.5 clients are requiring SMB
signing. Curiously, I noticed that my SMB4.conf file on my FreeBSD server
didn't even possess a `client signing` flag. Might all this be resolved if
I just add a `client signing = auto` flag for the server's SMB4.conf file,
so that the OS X client is talking properly to the server?

Thanks,
Seth Goldin

On Thu, May 26, 2016 at 2:25 PM, Jeremy Allison <jra at samba.org> wrote:

> On Thu, May 26, 2016 at 02:53:21PM +0000, Seth Goldin wrote:
> > Hello,
> >
> > I just wanted to check in on this list and see what folks know about the
> > new severe performance problems with OS X 10.11.5.
> >
> > There's a comment on Reddit claiming that 10.11.5 is requiring SMB
> signing,
> > but I haven't found documentation on that.
> >
> > I myself saw performance on my 10 GbE go from 800 MB/s on 10.11.4 to 60
> > MB/s on 10.11.5. My NAS is running Samba 4.3.6 on FreeNAS, which is a
> > FreeBSD derivative.
> >
> > I'd love the reassurance that whoever can fix this is doing so--either
> the
> > Apple developers or the Samba developers.
> >
> > Thanks in advance for any information you can provide.
>
> Has anyone done any wireshark analysis of the difference
> between 10.11.4 (fast) and 10.11.5 (slow) ? With such
> a drastic drop 800 MB/s -> 60 MB/s there should be an
> obvious difference in the packet flow.
>