Date: Wed, 2 Apr 2003 10:24:39 +0200 (CEST) From: Lukas Ertl <l.ertl@univie.ac.at> To: "Greg 'groggy' Lehey" <grog@FreeBSD.org> Cc: freebsd-stable@FreeBSD.org Subject: Re: vinum performance Message-ID: <20030402102225.Y19644@pcle2.cc.univie.ac.at> In-Reply-To: <20030402001826.GU34617@wantadilla.lemis.com> References: <20030330125138.K23911@leelou.in.tern> <20030330231000.GB1861@wantadilla.lemis.com> <20030402001826.GU34617@wantadilla.lemis.com>
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On Wed, 2 Apr 2003, Greg 'groggy' Lehey wrote: > > I've done some rawio benchmarks with different process counts (1, 2, 4,= 8, > > 16, 32 and 64). The results are at > > <http://mailbox.univie.ac.at/~le/rawio.html>. > > How does this compare to the raw disk? Oops, sorry, I've forgotten to include them on the page. They are on there now. Raw disk performance is indeed worse than RAID0/RAID5. Also interesting is that the sequential read performance drops significantly in all cases when going from 8 to 16 processes. Probably the bus is filled up then. best regards, le --=20 Lukas Ertl eMail: l.ertl@univie.ac.at UNIX-Systemadministrator Tel.: (+43 1) 4277-14073 Zentraler Informatikdienst (ZID) Fax.: (+43 1) 4277-9140 der Universit=E4t Wien http://mailbox.univie.ac.at/~le/
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