From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vladislav Bolkhovitin Subject: Re: [Scst-devel] Integration of SCST in the mainstream Linux kernel Date: Fri, 01 Feb 2008 14:50:40 +0300 Message-ID: <47A30790.8080402@vlnb.net> References: <20080130083239E.fujita.tomonori@lab.ntt.co.jp> <20080130195635T.tomof@acm.org> <1201785938.7280.105.camel@haakon2.linux-iscsi.org> <47A1EE54.6000005@vlnb.net> <47A1F67C.4020300@scalableinformatics.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Bart Van Assche Cc: landman@scalableinformatics.com, fujita.tomonori@lab.ntt.co.jp, linux-scsi@vger.kernel.org, rdreier@cisco.com, linux-kernel@vger.kernel.org, "Nicholas A. Bellinger" , James.Bottomley@hansenpartnership.com, scst-devel@lists.sourceforge.net, akpm@linux-foundation.org, FUJITA Tomonori , torvalds@linux-foundation.org List-Id: linux-scsi@vger.kernel.org Bart Van Assche wrote: > On Jan 31, 2008 5:25 PM, Joe Landman wrote: > >>Vladislav Bolkhovitin wrote: >> >>>Actually, I don't know what kind of conclusions it is possible to make >>>from disktest's results (maybe only how throughput gets bigger or slower >>>with increasing number of threads?), it's a good stress test tool, but >>>not more. >> >>Unfortunately, I agree. Bonnie++, dd tests, and a few others seem to >>bear far closer to "real world" tests than disktest and iozone, the >>latter of which does more to test the speed of RAM cache and system call >>performance than actual IO. > > > I have ran some tests with Bonnie++, but found out that on a fast > network like IB the filesystem used for the test has a really big > impact on the test results. > > If anyone has a suggestion for a better test than dd to compare the > performance of SCSI storage protocols, please let it know. I would suggest you to try something from real life, like: - Copying large file tree over a single or multiple IB links - Measure of some DB engine's TPC - etc. > Bart Van Assche. > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Scst-devel mailing list > Scst-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/scst-devel >