zfs discuss - Oct 2007 - Some test results: ZFS + SAMBA + Sun Fire X4500 (Thumper)

Hi

this may be of interest:

http://blogs.sun.com/timthomas/entry/samba_performance_on_sun_fire

I appreciate that this is not a  frightfully clever set of tests but I 
needed some throughout numbers....and the easiest way to share the 
results is to blog.

Rgds

Tim
-- 
*Tim Thomas
*Storage Systems Product Group*
* Sun Microsystems, Inc.

Internal Extension: x(70)18097
Office Direct Dial: +44-161-905-8097
Mobile: +44-7802-212-209
Email: Tim.Thomas at Sun.COM

Hi Tim,
  Sorry for mailing you directly; I meant to reply to the list.  My mistake.
On 10/8/07, Tim Thomas <Tim.Thomas at sun.com>
wrote:
> this was a one day project which is why I kept it simple and I
don''t
> have detailed data beyond what I collected for the graphs.
The graphs are pretty informative, even so.  You can see the
limitations of raid-z on it pretty clearly - 200 megabytes per second
requires six thousand IO/sec?!  That''s about 30k per I/O, which lines
up with what''s expected for 128k stripes on five-wide stripes... but
that''s still a lot of overhead.
> I was lucky enough to have the hardware to put this together (threw this
> ?) together very quickly
>
> I work in Engineering in Sun''s Systems Group in an ISV focused
team. We
> are having some discussions in the team about running a full suite of
> tests against SAMBA on Thumper but no firm plans yet...it is all about
> scheduling :-(
I can certainly understand scheduling limitations, and look forward to
any further results.  Having local equivalents to the samba tests
would also be interesting - write a local file at maximum speed, and
see how fast that goes and how many I/Os that generates. for example.
Non-sequential tests would be neat, too.

Will

Will et al

I added a few extra graphs to the original posting today showing the
work that an individual disk was doing

http://blogs.sun.com/timthomas/entry/samba_performance_on_sun_fire

and ran the RAID-Z config with fewer disks just to see what happened.

http://blogs.sun.com/timthomas/entry/another_samba_test_on_sun

What I find nice about Thumper/X4500''s is that they behave very
predictably..in my experience anyway.

Rgds

Tim

-- 

Signature

      Tim Thomas 

      Storage
Systems Product Group

       Sun Microsystems, Inc.

      Internal Extension: x(70)18097

Office Direct Dial: +44-161-905-8097

Mobile: +44-7802-212-209

Email: Tim.Thomas@Sun.COM


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Tim Thomas wrote:
> Hi
> 
> this may be of interest:
> 
> http://blogs.sun.com/timthomas/entry/samba_performance_on_sun_fire
> 
> I appreciate that this is not a  frightfully clever set of tests but I 
> needed some throughout numbers....and the easiest way to share the 
> results is to blog.
It seems that we can conclude that for this workload (streaming write over 
SAMBA), you saturated 2 x 1Gb/sec ethernet links, and the rest of the system 
(CPU, disk bandwidth) was under-utilized.

--matt