ZFS - benchmark & tuning before and after doubling RAM
spork at bway.net
Sat Jan 8 22:11:24 UTC 2011
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
> 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.
> Dan Langille - http://langille.org/
> freebsd-stable at freebsd.org mailing list
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