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/
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