I/O pattern of smbd / optimization of disk subsystem

[Min Wai Chan]

Hi Jones,

This is very interesting.

Does that still apply today on the current version?

Thank You.

On Sun, Oct 5, 2014 at 9:29 PM, Jones <jones.kstw at gmail.com> wrote:

> Hello Heiner,
>
> This link might be interesting:
> http://sambaxp.org/fileadmin/user_upload/SambaXP2010-DATA/Olaf_Flebbe.pdf
>
> --
> Regards,
> Jones
>
> 2014-10-03 22:49 GMT+08:00 Heiner Lesaar <heiner.lesaar at googlemail.com>:
>
> >
> > Dear list,
> >
> > I am keen to learn more about the characteristics on how smbd accesses
> the
> > disks in terms of request sizes. Does this depend on some of the smb.conf
> > parameters (max xmit etc.) or on the negotiated protocol with the smb
> > client?
> >
> > Can someone give me a hint on how to find out what the characteristic in
> > my usecase would be? I read about blktrace and collectl as some of the
> > suggested tools. Usage is mainly multiple, slow but big streaming reads
> and
> > writes.
> >
> > My goal is to optimize the disk subsystem config (multiple raid5 sets)
> to
> > get the best performance from the disks without suffering from
> side-effects
> > like read/modify/write penalties when the data isn't written in matching
> > allocation sizes to hit the "full stripe" of the disks. Same for read
> > processes obviously.
> >
> >
> > Thanks in advance for any input on this!
> >
> > Heiner
> >
> >
>