freebsd stable - Jan 2011 - ZFS - benchmark & tuning before and after doubling RAM

I've been running a ZFS array for about 10 months on a system with 4GB 
of RAM.  I'm about to add another 4GB of RAM.

I think this might be an opportune time to run some simple benchmarks 
and do some tuning.  Getting more out of the system is not a priority 
for me.  It does what I need now.  However, I do see some merit in 
writing something up for others to see/follow/learn.

The system is running FreeBSD 8.2-PRERELEASE #1: Tue Nov 30 22:07:59 EST 
2010 on a 64 bit box.  The ZFS array consists of 7x2TB commodity drives 
on two SiI3124 SATA controllers.  The OS runs off a gmirror RAID-1.

More details here: http://www.freebsddiary.org/zfs-benchmark.php

First, up, I've done a simple bonnie++ benchmark before I add more RAM. 
  I ran this on two different datasets; one with compression enabled, 
one without.

If anyone has suggestions for various tests, option settings, etc, I'm 
happy to run them and include the results.  We have lots of time to play 
with this.

-- 
Dan Langille - http://langille.org/

On Sat, Jan 8, 2011 at 3:37 PM, Dan Langille <dan@langille.org> wrote:
> I've been running a ZFS array for about 10 months on a system with 4GB
of
> RAM.  I'm about to add another 4GB of RAM.
>
> I think this might be an opportune time to run some simple benchmarks and
> do some tuning.  Getting more out of the system is not a priority for me.
>  It does what I need now.  However, I do see some merit in writing
something
> up for others to see/follow/learn.
>
> The system is running FreeBSD 8.2-PRERELEASE #1: Tue Nov 30 22:07:59 EST
> 2010 on a 64 bit box.  The ZFS array consists of 7x2TB commodity drives on
> two SiI3124 SATA controllers.  The OS runs off a gmirror RAID-1.
>
> More details here: http://www.freebsddiary.org/zfs-benchmark.php
>
> First, up, I've done a simple bonnie++ benchmark before I add more RAM.
I
> ran this on two different datasets; one with compression enabled, one
> without.
>
> If anyone has suggestions for various tests, option settings, etc, I'm
> happy to run them and include the results.  We have lots of time to play
> with this.
>
> --
> Dan Langille - http://langille.org/
>


I think , you know the following pages :

http://hub.opensolaris.org/bin/view/Community+Group+zfs/zfstestsuite
http://dlc.sun.com/osol/test/downloads/current/
http://hub.opensolaris.org/bin/view/Community+Group+testing/testsuites
http://hub.opensolaris.org/bin/view/Community+Group+testing/zones

Some of the links may disappear spontaneously because of restructuring of
their respective sites .

Thank you very much .


Mehmet Erol Sanliturk

On Sat, 8 Jan 2011, Dan Langille wrote:
> I've been running a ZFS array for about 10 months on a system with 4GB
of
> RAM.  I'm about to add another 4GB of RAM.
>
> I think this might be an opportune time to run some simple benchmarks and
do
> some tuning.  Getting more out of the system is not a priority for me.  It 
> does what I need now.  However, I do see some merit in writing something up
> for others to see/follow/learn.
>
> The system is running FreeBSD 8.2-PRERELEASE #1: Tue Nov 30 22:07:59 EST
2010
> on a 64 bit box.  The ZFS array consists of 7x2TB commodity drives on two 
> SiI3124 SATA controllers.  The OS runs off a gmirror RAID-1.
>
> More details here: http://www.freebsddiary.org/zfs-benchmark.php
>
> First, up, I've done a simple bonnie++ benchmark before I add more RAM.
I
> ran this on two different datasets; one with compression enabled, one 
> without.
>
> If anyone has suggestions for various tests, option settings, etc, I'm
happy
> to run them and include the results.  We have lots of time to play with
this.
iozone is interesting.  I bought the excel plugin from the developer to 
generate the nice 3D graphs.  I'd love to put some of my graphs up 
somewhere for comparison...  It's a very time-consuming test though.

Charles
> -- 
> Dan Langille - http://langille.org/
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