Date: Sun, 24 Aug 2003 21:55:48 -0600 From: Tillman Hodgson <tillman@seekingfire.com> To: freebsd-questions@freebsd.org Subject: Re: hard disk performance issue Message-ID: <20030824215548.H30641@seekingfire.com> In-Reply-To: <000001c36ab7$8017aae0$0300a8c0@owl>; from canman@ev1.net on Sun, Aug 24, 2003 at 10:18:05PM -0500 References: <20030825003158.GA72370@falcon.midgard.homeip.net> <000001c36ab7$8017aae0$0300a8c0@owl>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sun, Aug 24, 2003 at 10:18:05PM -0500, Chris Newman wrote: > Hmm... when I do what you suggest, here's what I get... > > tigger# dd if=/dev/ad8s1d of=/dev/null bs=64k count=100 > 100+0 records in > 100+0 records out > 6553600 bytes transferred in 0.147501 secs (44430888 bytes/sec) > tigger# dd if=/dev/ad8s1d of=/dev/null bs=100k count=100 > 100+0 records in > 100+0 records out > 10240000 bytes transferred in 0.230168 secs (44489246 bytes/sec) > tigger# dd if=/dev/ad8s1d of=/dev/null bs=200k count=100 > 100+0 records in > 100+0 records out > 20480000 bytes transferred in 0.429506 secs (47682693 bytes/sec) > > ~47MB ? huge difference > > I'm still not sure at this point what the best way is to evaluate whether > I'm getting my money's worth out of this disk/controller. How do I do a good > benchmark of the speed? /usr/ports/benchmarks/bonnie++ with and without the new controller? Of course, that'll only tell you if it's faster. "Value" means that you're paying for extra speed that you actually /need/. The best way to measure this is to benchmark whatever you use this particular computer for and decide if any speed difference is worth the price of the controller. -T -- The supreme irony of life is that hardly anyone gets out alive. - Robert Heinlein
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20030824215548.H30641>