Date: Sat, 8 Jan 2011 17:11:22 -0500 (EST) From: Charles Sprickman <spork@bway.net> To: Dan Langille <dan@langille.org> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: ZFS - benchmark & tuning before and after doubling RAM Message-ID: <alpine.OSX.2.00.1101081709510.1645@hotlap.local> In-Reply-To: <4D28CB06.8030301@langille.org> References: <4D28CB06.8030301@langille.org>
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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/ > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >
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