Date: Thu, 23 Oct 2008 18:01:59 -0400 From: Stephen Sanders <ssanders@softhammer.net> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-performance@freebsd.org Subject: Re: Disk Throughput test Message-ID: <1224799319.3229.5.camel@pepin.softhammer.net> In-Reply-To: <gdqm2b$3k9$1@ger.gmane.org> References: <490097CC.9010802@opnet.com> <gdqm2b$3k9$1@ger.gmane.org>
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Good point. I plan to switch to 7.0, though the system is running the ULE scheduler. The cpu's are amd64. I tested early on with bonnie++ and was getting similar numbers to the application test. It's a good idea to try it again so I will. The RAID is a RAID 6 as the application calls for data integrity though I do plan on doing a RAID 0 test as well. The array is something like 7TB total. Thanks. On Thu, 2008-10-23 at 22:16 +0200, Ivan Voras wrote: > Stephen Sanders wrote: > > FreeBSD 6.3 > > Dual Quad Core Xeon 5450@3Ghz > > FreeBSD 6.3 isn't very suited for your CPU. If your workload isn't > completely CPU bound (i.e. if isn't Seti@Home), you will not only not > make use of all 8 CPU cores but will probably get worse performance with > 8 CPUs than with 2 CPUs. Upgrade to at least 7.0 and you'll probably > need 7.1-BETA2 to maximally use your CPU. > > But if you don't have much IO contention it's probably not related to > your problem. > > > 16GB RAM > > You're using the AMD64 version, right? > > > 3Ware 9650SE-ML / 256MB cache > > 14 Seagate 750GB/7200RPM/ST375033ONS SATA drives > > Which RAID mode? What is the total size of your array? > > > We have an application that is streaming data to disk at the maximum > > rate the controller can sustain. The controller should be able to > > develop something on the order of 600MB/s but we're only getting 450MB/s. > > Can you use something like bonnie++ to test your configuration? >
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