FreeBSD 5.3 I/O Performance / Linux 2.6.10 | Continued Discussion

Nick Pavlica linicks at
Mon Jan 24 13:59:59 PST 2005

  I would like to start addressing some of the feedback that I have
been given.  I started this discussion because I felt that it was
important to share the information I discovered in my testing.  I also
want to reiterate my earlier statement that this is not an X vs. X 
discussion, but an attempt to better understand the results, and
hopefully look at ways of improving the results I had with FreeBSD
5.x.  I'm also looking forward to seeing the improvements to the 5.x
branch as it matures.  I want to make it very clear that this is NOT A
"Religious/Engineering War", please don't try to turn it into one.

That said, lets move on to something more productive.  I installed
both operating systems using as many default options as possible and
updated them with all of the latest patches.  I was logged in via SSH
from my workstation while running the tests.  I didn't have X, running
on any of the installations because it wasn't need.  CPU and RAM
utilization wasn't an issue during any of the tests, but the disk I/O
performance was dramatically different.  Please keep in mind that I
ran these tests over and over to see if I had consistent results.  I
even did the same tests on other pieces of equipment not listed in my
notes that yielded the same results time and time again.  Some have
confirmed that they have had similar results in there testing using
other testing tools and methods.  This makes me wounder why the gap is
so large, and how it can be improved?

I think that it would be beneficial to have others in this group do
similar testing and post there results.  This may help those that are
working on the OS itself to find trouble areas, and ways to improve
them.  It may also help clarify many of the response questions because
you will be able to completely control the testing environment.  I
look forward to seeing the testing results, and any good feedback that
helps identify specific tuning options, or bugs that need to be

--Nick Pavlica
--Laramie, WY

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