ZFS - benchmark & tuning before and after doubling RAM

Dan Langille dan at langille.org
Sat Jan 8 23:14:19 UTC 2011

On 1/8/2011 4:33 PM, Mehmet Erol Sanliturk wrote:
> On Sat, Jan 8, 2011 at 3:37 PM, Dan Langille <dan at langille.org
> <mailto:dan at 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 .

Looking briefly, them seen to be more aimed at regression testing than a 
benchmark.  They all seem to be the same thing (just different instances).

Perhaps I am mistaken, but I will look closer.

Dan Langille - http://langille.org/

More information about the freebsd-stable mailing list