[Samba] aio settings for samba 4.3

[Jeremy Allison]

On Fri, Jul 22, 2016 at 08:30:42AM -0500, Russell R Poyner wrote:
> 
> Thanks for all the zfs tuning tips. The point is a good one.
> 
> I was concerned that zfs performance might be limiting, and posted
> tests run against a ufs formatted ram disk for that reason. The
> tests with the ram disk are slightly faster than the zfs backed
> tests, but still slower than tests run with samba on linux using xfs
> on a single hard disk.

Maybe a networking issue ? Once you've elimated disk bottlenecks
there aren't many other places left to look.