[SCM] Samba Shared Repository - branch master updated

[Ira Cooper]

On Fri, Jan 6, 2012 at 5:40 PM, Jeremy Allison <jra at samba.org> wrote:

> On Fri, Jan 06, 2012 at 10:29:27PM +0100, Volker Lendecke wrote:
> > On Fri, Jan 06, 2012 at 09:59:13AM -0800, Jeremy Allison wrote:
> > > > Hmmm. I don't think this is the right approach. Think 1 CPU,
> > > > 16 disks in a fat raid0. You want all spindles busy I think.
> > >
> > > Ok, how do you suggest this is tuned ?
> >
> > Don't know. My gut feeling is that we will end up with a
> > global credit algorithm pretty soon. I think the aio module
> > is too low-level for this, we should just spawn threads as
> > more aio requests come in. For smb1 I am not too worried
> > that we get overflowed, but with smb2 the picture might
> > change. But there we have the credit algorithm to slow down
> > clients when we get overflowed. I have no clue yet how this
> > might work, but I think that is the right place to tackle
> > the problem of getting flooded.
>
> Ok, for now I've allowed a "aio num threads" module
> parameter to override the num cores heuristic.
>
> Or should I just set this to the number of credits
> allowed in SMB2 ?
>
>
No.  I believe that number is over 1024.

-Ira