Date: Tue, 28 May 2002 09:57:33 +0930 From: Greg 'groggy' Lehey <grog@FreeBSD.org> To: Tod McQuillin <devin@spamcop.net> Cc: Miguel Mendez <flynn@energyhq.homeip.net>, Cy Schubert - CITS Open Systems Group <Cy.Schubert@uumail.gov.bc.ca>, Kirk Strauser <kirk@strauser.com>, freebsd-stable@FreeBSD.ORG Subject: Re: Hardware RAID vs vinum Message-ID: <20020528095733.C16567@wantadilla.lemis.com> In-Reply-To: <20020527224614.V424-100000@glass.pun-pun.prv> References: <20020527153552.A72342@energyhq.homeip.net> <20020527224614.V424-100000@glass.pun-pun.prv>
next in thread | previous in thread | raw e-mail | index | archive | help
On Monday, 27 May 2002 at 22:48:54 +0900, Tod McQuillin wrote: > On Mon, 27 May 2002, Miguel Mendez wrote: > >> On Mon, May 27, 2002 at 06:02:23AM -0700, Cy Schubert - CITS Open Systems Group wrote: >> >>> Did we see a difference in CPU utilization? No. However ODS and VxVM >>> run below the kernel and cannot be measured by vmstat or sar, which is >>> different to how vinum works because it is part of the kernel. >> >> I feel curious about this. Both ODS and VxVM are just kernel modules >> that sit between hardware and the VFS layer if I'm not mistaken. What >> makes them different than vinum? > > I don't have experience with vinum, but we also experienced terrible > performance with Sun's ODS and software RAID-5. We didn't notice similar > problams with Veritas volume manager. > > I'm beginning to think it's peculiar to ODS, and that other software > RAID-5 implementations probably work a lot better. This makes more sense to me. Greg -- See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020528095733.C16567>